CLOUDSTACK-850 saksham's comments fixed
CLOUDSTACK-4104: VM Creation should fail if a zone is dedicated to a domain and user of the same domain deploys vm without using affinity group "Explicit Dedication".
CLOUDSTACK-4101: Update the Xenserver template/checksum in template.sql to the one verified.
CLOUDSTACK-4062: SLES 11 SP2, SLES 11 SP3, CENTOS 6.4, RHEL 6.3, RHEL 6.4 OS type missing from OS Type drop down list when registering template.

Also added the support of different versions of SLES, RHEL, Oracle Linux guest OS which was not there in the list.