To make the mount of /install check to be accurate.

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/branches/2.8@16864 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT/postscripts/ospkgs

@@ -210,7 +210,7 @@ fi
 
 #check if /install is mounted on the server, we may need to add code to conver NFSSERVER to ip 
 mounted=0;
-result=`mount |grep /install |grep $NFSSERVER`
+result=`mount |grep " $INSTALLDIR " |grep $NFSSERVER`
 if [ $? -eq 0 ]; then
     NFSSERVER="/install"
     mounted=1