[TEST] PubSub: Unit test for Int32 variable
[TEST] PubSub: Unit test for Int32 variable

 - Verify Published and Subscribed Int32 data
 - Modify the Publishing interval from 100 to 5 ms
   for verifying the Subscriber as the Subscriber is
   called at a 5 ms

Change-Id: I1ac5109a7845fa551b780b3c9627dcd977e0126e

JGrothoff/open62541,JGrothoff/open62541,JGrothoff/open62541,StalderT/open62541,jpfr/open62541,jpfr/open62541,open62541/open62541,jpfr/open62541,StalderT/open62541,open62541/open62541,jpfr/open62541,StalderT/open62541,open62541/open62541,StalderT/open62541,open62541/open62541,JGrothoff/open62541