LU-6210 mgs: Change positional struct initializers to C99

LU-6210 mgs: Change positional struct initializers to C99

This patch makes no functional changes.  Struct initializers in the
mgs directory that use C89 or GCC-only syntax are updated to C99
syntax.  Whitespace is corrected to match the coding style guidelines.

The C99 syntax prevents incorrect initialization if values are
accidently placed in the wrong position, allows changes in the struct
definition, and clears any members that are not given an explicit
value.

The following struct initializers have been updated:

lustre/mgs/mgs_handler.c:
	struct lustre_handle lockh
	struct lustre_handle conn
lustre/mgs/mgs_llog.c:
	struct mgs_fsdb_handler_data d

Test-Parameters: trivial
Signed-off-by: Steve Guminski <stephenx.guminski@intel.com>
Change-Id: I36cbeaae50982b6f72d271997b229c46d085a6ee
Reviewed-on: https://review.whamcloud.com/23794
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>