Closes-Bug: #1571509 - SM Upgrade failed because cassandra version ch…

…anged

New cassandra version is 2.1.13 in 3.0
This change will allow to upgrade to any version higher than or equal to 2.1.9

Change-Id: I7fb4a0059c4dac01787456e2f5cfa6f8498c30aa

contrail/environment/modules/contrail/files/upgrade_cassandra.sh

@@ -5,7 +5,8 @@ database_dir=$1; shift
 contrail_package_name=$1
 cassandra_version=''
 cassandra_version=`dpkg -s cassandra | grep Version | awk '{print $2}'`
-if [ "$cassandra_version" == "2.1.9" ] || [ "$cassandra_version" == '' ]; then
+version_check=`echo -e "$cassandra_version\n2.1.9" | sort -V | head -n1`
+if [ "$version_check" == "2.1.9" ] || [ "$cassandra_version" == '' ]; then
   # Don't do upgrade
   exit
 fi