Correcting minor issue where the Mondrian version string can be incorrectly replaced in a method used by Xmla tests.  This was causing the failure in mondrian.xmla.XmlaExcelXPTest.test24.
Moved Util.maskVersion() to the XmlaBaseTestCase, since it's a test utility and shouldn't be outside of testsrc.
Merge pull request #113 from mkambol/versionString

Correcting minor issue where the Mondrian version string can be incorrec...