Task #10339: try import, skip test if package not available. package mock is...

Task #10339: try import, skip test if package not available. package mock is required for build, just for run.

SAS/MoM/MoMQueryService/test/CMakeLists.txt

@@ -2,7 +2,7 @@
 include(LofarCTest)
 include(FindPythonModule)
 
-find_python_module(mock REQUIRED)
+find_python_module(mock)
 
 lofar_add_test(test_momqueryservice)
 

SAS/MoM/MoMQueryService/test/test_momqueryservice.py

@@ -19,11 +19,23 @@
 
 # $Id:  $
 import unittest
-import mock
-import testing.mysqld
 import uuid
 from mysql import connector
 
+try:
+    import mock
+except ImportError as e:
+    print str(e)
+    print 'Please install python package mock: sudo apt-get install python-mock'
+    exit(3) #special lofar test exit code: skipped test
+
+try:
+    import testing.mysqld
+except ImportError as e:
+    print str(e)
+    print 'Please install python package testing.mysqld: sudo pip install testing.mysqld'
+    exit(3) #special lofar test exit code: skipped test
+
 from lofar.common.dbcredentials import Credentials
 from lofar.mom.momqueryservice.momqueryrpc import MoMQueryRPC
 from lofar.mom.momqueryservice.config import DEFAULT_MOMQUERY_SERVICENAME