Modularize VistATestClient Arguments Passing in CMake

Create two functions to generate VistATestClient Arguments list
in CommonFunctions.cmake file. Refactoring all places to use the new
function call. Also remote extra quotation marks in UnitTest.cmake.in to
get rid of a cmake warning.

OSEHRA-Id: http://issues.osehra.org/browse/OAT-130
Change-Id: I64fdb9dd6a3789fbab87a9f611b065124087a2d4
Merge "Modularize VistATestClient Arguments Passing in CMake"