LU-1842 quota: new sanity-quota tests

LU-1842 quota: new sanity-quota tests

Added new sanity-quota.sh for the new quota architecture, meanwhile,
the old sanity-quota.sh is reserved for the interoprability with
old server.

Removed the quotacheck tests in conf-sanity, since quotacheck is
deprecated in the new quota architecture.

Test-Parameters: envdefinitions=SLOW=yes testlist=sanity-quota

Signed-off-by: Niu Yawei <niu@whamcloud.com>
Change-Id: Ia3e3248a167e9f312a782aefea7af0aeced52220
Reviewed-on: http://review.whamcloud.com/4040
Tested-by: Hudson
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Fan Yong <yong.fan@whamcloud.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>