engine: Moved getUpServerId to GlusterQueriesCommandBase

  Moved getUpServerId() to base class GlusterQueriesCommandBase,
  so that other gluster queries like GetGlusterVolumeProfileInfoQuery,
  GetGlusterVolumeOptionsInfoQuery and GetGlusterVolumeAdvancedDetailsQuery
  can make use of it.

Change-Id: Ia71ac0984d13adbd59af96ef00f6459d65595d29
Signed-off-by: Dhandapani <dgopal@redhat.com>