MCOL-419 - change to not call sudo on root user, causing a problem where service isn't starting up on centos7

oam/install_scripts/columnstore

@@ -56,10 +56,9 @@ if [ "x$has_um" = x ]; then
 	has_um=0
 fi
 
-user=root
+user=`whoami 2>/dev/null`
 SUDO=" "
-if [ "$USER" != "root" ]; then
-	user=$USER
+if [ $user != "root" ]; then
         SUDO="sudo "
 fi
 
@@ -91,7 +90,7 @@ start() {
 			exit 1
 		fi
 	fi
-	checkInstallSetup
+	#checkInstallSetup
 
 	CoreFileFlag=`$InstallDir/bin/getConfig -c $InstallDir/etc/Columnstore.xml Installation CoreFileFlag`
 	if [ $CoreFileFlag = "y" ]; then