chan_motif / chan_pjsip: Fix incorrect "No such module" messages when reloading.

chan_motif / chan_pjsip: Fix incorrect "No such module" messages when reloading.

For chan_motif the direct return value of the underlying config options framework
was passed back. This can relay various states which the module loader would not
interpet as success. It has been changed so only on errors will it report back
an error.

For chan_pjsip the code implemented a dummy reload function which always
returned an error. This has been removed as all configuration is held within
res_pjsip instead.

ASTERISK-23651 #close
Reported by: Rusty Newton

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@427981 65c4cc65-6c06-0410-ace0-fbb531ad65f3