auth: initKeys before first error exit path

auth: initKeys before first error exit path

In afsconf_OpenInternal() _afsconf_InitKeys() must be called
before the first opportunity to call afsconf_CloseInternal()
or a crash can occur if the CellServDB file cannot be parsed.

Change-Id: I5b2487056a24d0c4ad78921d85df755758c7679e
Reviewed-on: http://gerrit.openafs.org/6059
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>