LU-1199 build: Simplify autotools version checks

Simplify the check for minumum autoconf and automake
versions by using standard macros in configure.ac
rather than using shell functions in autogen.sh.

Note that I am bumping the minimum automake version
from 1.9 to 1.10.

Change-Id: I009c316a54d8d517abea0d1808dc244e2353b2aa
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/4693
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Brian J. Murrell <brian.murrell@intel.com>
Reviewed-by: Minh Diep <minh.diep@intel.com>
LU-2361 quota: quiet warning when acct isn't enabled

Don't print a warning to the console on every mount when space
accounting is disabled.

Signed-off-by: Johann Lombardi <johann.lombardi@intel.com>
Change-Id: I7e1855c21f509b755c0452824eefe1084a1c33f1
Reviewed-on: http://review.whamcloud.com/4968
Tested-by: Hudson
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>