Catch loadModel errors

[AnHeuermann]

Issue

Loading a broken library crashes the script:

Skipping IDEAS as we already have results for it: (1762983975, '3.0.0 (https://github.com/open-ideas/IDEAS/archive/a7be00b7e07943c0acda1b5799a8d32bea896d7b.zip)', 'IDEAS', 'master', 'OMCompiler v1.26.0-dev.473+g1d95b24818')
Traceback (most recent call last):
  File "/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/./test.py", line 666, in <module>
    if not omc.sendExpression('loadModel(%s,%s%s)' % (lib,versions,exactMatch)):
  File "/usr/local/lib/python3.10/dist-packages/OMPython/OMCSession.py", line 410, in sendExpression
    raise OMCSessionException(msg)
OMPython.OMCSession.OMCSessionException: [OMC log for 'sendExpression(loadModel(IDEAS,{"master"}), True)']: [syntax:error:2] No viable alternative near token: break
Command exited with non-zero status 1
117.91user 33.54system 1:12.69elapsed 208%CPU (0avgtext+0avgdata 1608836maxresident)k
401840inputs+1794112outputs (79649major+6121527minor)pagefaults 0swaps
+ killall omc
omc: no process found

Changes

• omc.sendExpression now throws OMCSessionException when failing to load.
• Handle it with a try block.