Add CI scripts

This is a back forward port of the CI scripts from cdi-1.8.x together with several fixes that make the tests green.

Let's keep the develop green once this is merged.

@k202125 @jahns @m300433 FYI

examples/pio/Makefile.am

@@ -16,8 +16,8 @@ endif
 collectData_SOURCES=collectData.c
 
 if USE_MPI
-LDADD=$(top_builddir)/src/libcdipio.la $(LIBRT) $(MPI_C_LIB)
-collectData2003_LDADD=$(top_builddir)/src/libcdipio.la $(LIBRT) $(MPI_FC_LIB)
+LDADD=$(top_builddir)/src/libcdipio.la $(top_builddir)/src/libcdi.la $(YAXT_LIBS) $(MPI_C_LIB)
+collectData2003_LDADD=$(top_builddir)/src/libcdipio.la $(top_builddir)/src/libcdi.la $(YAXT_LIBS) $(MPI_FC_LIB)
 else
 LDADD=$(top_builddir)/src/libcdi.la
 collectData2003_LDADD=$(top_builddir)/src/libcdi.la