LU-5834 build: obsolete lustre-client if installing server

When installing the "lustre" (client+server) package, obsolete
older lustre-client package so that it can install without error.

Remove ancient Provides: and Obsoletes: lines from 1.2 days.

Fix remaining Provides: and Obsoletes: and package Group: lines
so they contain version numbers and names to make rpmlint happy.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Ifdd1d7567ab03d0d1dfa599b592b6f28e09cab07
Reviewed-on: https://review.whamcloud.com/20162
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Minh Diep <minh.diep@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>