Reverted "Fixed invalid presence condition for MERGE_UPDATE_SITE

mkdir -p $targetDownloadsLocation

cp $localUpdateSiteArchiveLocation $targetDownloadsLocation

if [ -n $MERGE_UPDATE_SITE ] && [ -f "$targetUpdateSiteLocation/content.*" ];

if [ $MERGE_UPDATE_SITE != "false" ] && [ -f "$targetUpdateSiteLocation/content.*" ];

	then

		echo "------------------------------------------------------------------------"

		echo "Merging project update site into build update site"