Removed "gid=kvm" from hugepages mount opts

Fix for https://mirantis.jira.com/browse/PROD-10786

Option "gid=kvm" is actually not needed now, since we didn't merge
change to apparmor config that will require this option.

Change-Id: Ib377444a01d097151d9a3a3b4a16e2ac75b868ab

linux/system/hugepages.sls

     - device: Hugetlbfs-kvm
     - fstype: hugetlbfs
     - mkmnt: true
-    - opts: mode=775,gid=kvm,pagesize={{ hugepages.size }}
+    - opts: mode=775,pagesize={{ hugepages.size }}
 
 {%- endif %}