Updated the .gitlab-ci.yml to work on detecting openmpi

2 jobs for gitlab-runner in 16 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #283985
build

00:00:16

 
  Test
skipped #283986
test
 
Name Stage Failure
failed
build Build
Linking C executable spectrald
[ 73%] Built target spectrald
Scanning dependencies of target strider
[ 80%] Building C object examples/CMakeFiles/strider.dir/strider.c.o
/bin/sh: mpicc: command not found
make[2]: *** [examples/CMakeFiles/strider.dir/build.make:59: examples/CMakeFiles/strider.dir/strider.c.o] Error 127
make[1]: *** [CMakeFiles/Makefile2:172: examples/CMakeFiles/strider.dir/all] Error 2
make: *** [Makefile:117: all] Error 2
ERROR: Job failed: command terminated with exit code 1