Revert "pom: fix xapi version from root pom.xml as 41c0eaa remove it from deps/XenServer"

This reverts commit b6ee5e6455176e75c67b74241b1a9f6160cc62a1.
XenServerJava: revert xapi version string to have -SNAPSHOT suffix

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>