Merge "res_ari: Add "module loaded" check to ari stubs"

include/asterisk/ari.h

res/res_ari_applications.c

res/res_ari_asterisk.c

res/res_ari_bridges.c

res/res_ari_channels.c

res/res_ari_device_states.c

res/res_ari_endpoints.c

res/res_ari_events.c

res/res_ari_mailboxes.c

res/res_ari_playbacks.c

res/res_ari_recordings.c

res/res_ari_sounds.c

rest-api-templates/res_ari_resource.c.mustache