MSC_Tests: make sure SGs tests don't interfere

The IMSIs used with the SGs tests are partially re-used in other SGs
testcases and also in unrelated testcases. Lets give each SGs test a
unique IMSI to prevent unrelated interference with other tests.

Change-Id: I417d9c5f0fbab7483d1b31dc20a99f63ee1bbfe6
Related: OS#3614
1 file changed