ARI: Correct segfault with /variable calls are missing ?variable parameter.
Both /asterisk/variable and /channel/{channelId}/variable requires a
?variable parameter to be passed into the query. But we weren't checking
for the parameter being missing, which caused a segfault.
All calls now properly return 400 Bad Request errors when the parameter
is missing. The Swagger api-docs were updated accordingly.
(closes issue ASTERISK-22273)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@397306
65c4cc65-6c06-0410-ace0-
fbb531ad65f3