Remove MUnit dependency on VistA-FOIA repo

Remove the call to the TEST_VISTA_FRESH_M_DIR/Scripts directory. Instead,
use the VISTA_SOURCE_DIR/Scripts

Remove the set of the TEST_VISTA_FRESH_M_DIR from the MUnit creation block
of the CMakeLists.txt

OSEHRA-Issue: http://issues.osehra.org/browse/OAT-62
Change-Id: Ibf34ccbb8c3134f3174fca0caec350440332dcd5
Merge "Remove MUnit dependency on VistA-FOIA repo"