UnitTest: Add Unit Tests for ZTMGRSET

Test the PATCH and RELOAD entry points in ZTMGRSET using patch numbers
less than 999 and greater than 999.

Add support to Functional Testing CMakeLists to support VistATestClient
Unit Tests

OSEHRA-Id: http://issues.osehra.org/browse/VAF-89
Change-Id: I8630468f6677b83e2eed52f1502e31510b946a02
Merge "UnitTest: Add Unit Tests for ZTMGRSET"