change hostname of ralfs machine

.rake.json

 { "hosts": {
-    "luthien": {
+    "melian": {
       "hostname": "localhost",
       "dir": "/home/ram/builds/cdo/auto",
-      "CC": ["gcc","g++","clang","clang++"]
+      "CC": ["gcc","clang"]
     },
     "breeze": {
       "hostname": "breeze.mpimet.mpg.de",
       "dir": "/home/mpim/m300064/builds/remote",
       "envConfigFiles": ["/etc/profile","~/.profile"],
-      "CC": ["gcc","g++","clang","clang++","icc","icpc","pgcc"]
+      "CC": ["gnu","intel","pgi"]
     },
     "mistral": {
       "hostname": "mistral.dkrz.de",
       "dir": "/work/mh0287/users/ralf/builds/remote/cdo",
       "envConfigFiles": ["/etc/profile",".profile"],
-      "CC": ["gcc","g++","icc","icpc"]
+      "CC": ["gnu_pic","gnu","intel","pgi"]
     },
     "cygwin": {
       "hostname": "cdo4windows-cyg.mpimet.mpg.de",
@@ -26,13 +26,12 @@
       "hostname": "daint.cscs.ch",
       "dir": "/users/ram/builds/cdo",
       "username": "ram",
-      "CC": ["icc","pgcc","cray","gcc"]
+      "CC": ["intel","pgi","cray","gnu"]
     },
     "wanglung": {
       "hostname": "wanglung.mpimet.mpg.de",
       "dir": "/home/zmaw/m300064/builds/remote/cdo",
-      "username": "m300064",
-      "CC": ["icc","pgcc","cray","gcc"]
+      "username": "m300064"
     },
     "ubuntu-32bit": {
       "hostname": "cdo4windows-ubuntu.mpimet.mpg.de",
@@ -46,31 +45,32 @@
 
   "builders": {
     "localCLANG_noOpenMP": {
-      "hostname": "luthien",
+      "hostname": "melian",
+      "preCommands":"",
       "configureCall": "/home/ram/src/cdo/configure --with-netcdf --disable-openmp CC=clang CXX=clang++  LDFLAGS=-lhdf5",
       "makeCall": "make -j 12",
       "sync": false
     },
     "localCLANG": {
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "/home/ram/src/cdo/configure --with-netcdf CC=clang CXX=clang++ CFLAGS='-g -O0' CXXFLAGS='-g -fopenmp' LDFLAGS='-lhdf5 -fopenmp=libiomp5'",
       "makeCall": "make -j 12",
       "sync": false
     },
     "localCLANG_Debug": {
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "/home/ram/src/cdo/configure --with-netcdf CC=clang CXX=clang++ CFLAGS='-g -O0 -Wall -fopenmp' CXXFLAGS='-g -O0 -Wall -fopenmp=libiomp5'",
       "makeCall": "make -j 12",
       "sync": false
     },
     "localGCC": {
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "/home/ram/src/cdo/configure --enable-hirlam-extensions --with-grib_api --with-netcdf --with-magics --with-udunits2 CFLAGS='-g -O3 -std=gnu99 -Wall -fopenmp -march=native' CPPFLAGS='-I/usr/include/magics' LDFLAGS='-leccodes'",
       "makeCall": "make -j 12",
       "sync": false
     },
     "localGCC_stackFail": {
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "/home/ram/src/cdo/configure --enable-hirlam-extensions --with-eccodes --with-netcdf --with-magics --with-udunits2 CFLAGS='-std=gnu99 -O2 -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fopenmp' CXXFLAGS='-std=gnu++11 -O2 -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fopenmp' CPPFLAGS='-I/usr/include/magics'",
       "makeCall": "make -j 12",
       "sync": false
@@ -101,21 +101,21 @@
       "sync": true
     },
     "localPgi": {
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "./configure CC=pgcc CXX=pgc++ FC=pgfortran CPPFLAGS=-I/home/ram/local/pgi/linux86-64/17.10/include",
       "makeCall": "make -j 12",
       "sync": true
     },
     "localGCC_static": {
       "doc": "local builder with default GCC - VPATH build - As-Static-As-Possible",
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "/home/ram/src/cdo/configure --enable-openmp --enable-all-static --with-netcdf --with-hdf5 --with-proj --with-udunits2 CC=gcc CFLAGS='-g -O2'",
       "makeCall": "make -j 12",
       "sync": false
     },
     "AUR":{
       "doc": "local buildder for testing AUR-package",
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "/home/ram/src/cdo/configure --prefix=/usr --with-netcdf=/usr --with-udunits2=/usr --with-hdf5=/usr --with-szlib=/usr --with-proj=/usr --with-fftw3 --with-curl=/usr --with-eccodes=/usr --with-magics=/usr --with-libxml2=/usr CFLAGS='-g -O3 -std=gnu99 -Wall -fopenmp -march=native'  CXXFLAGS='-g -O3 -std=c++11 -Wall -fopenmp -march=native' LIBS='-lhdf5 -ljasper -lpng -lopenjpeg' CPPFLAGS='-I/usr/include/magics -I/usr/include/libxml2'",
       "makeCall": "make -j 12",
       "sync": false
@@ -151,7 +151,7 @@
       "sync": true
     },
     "localIntel": {
-      "hostname": "luthien",
+      "hostname": "melian",
       "configureCall": "/home/ram/src/cdo/configure --with-netcdf --with-eccodes CC=/home/ram/src/tools/spack/opt/spack/linux-arch-x86_64/gcc-7.2.0/intel-18.0.1-si3z4sjcsfivnzl6znctszuevsktcflf/compilers_and_libraries_2018.1.163/linux/bin/intel64/icc CXX=/home/ram/src/tools/spack/opt/spack/linux-arch-x86_64/gcc-7.2.0/intel-18.0.1-si3z4sjcsfivnzl6znctszuevsktcflf/compilers_and_libraries_2018.1.163/linux/bin/intel64/icpc FC=/home/ram/src/tools/spack/opt/spack/linux-arch-x86_64/gcc-7.2.0/intel-18.0.1-si3z4sjcsfivnzl6znctszuevsktcflf/compilers_and_libraries_2018.1.163/linux/bin/intel64/ifort",
       "makeCall": "make -j 12",
       "sync": false