nagios: Fix use of wrong variable in check_rabbitmq_queue.
nagios: Fix use of wrong variable in check_rabbitmq_queue.

That was supposed to be queue_name, not queue - the latter leads to
nonsensical results.

synicalsyntax/zulip,kou/zulip,andersk/zulip,zulip/zulip,showell/zulip,rht/zulip,synicalsyntax/zulip,brainwane/zulip,punchagan/zulip,timabbott/zulip,showell/zulip,timabbott/zulip,brainwane/zulip,punchagan/zulip,eeshangarg/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,shubhamdhama/zulip,zulip/zulip,rht/zulip,eeshangarg/zulip,brainwane/zulip,showell/zulip,timabbott/zulip,kou/zulip,timabbott/zulip,rht/zulip,brainwane/zulip,hackerkid/zulip,hackerkid/zulip,synicalsyntax/zulip,showell/zulip,shubhamdhama/zulip,shubhamdhama/zulip,punchagan/zulip,synicalsyntax/zulip,andersk/zulip,rht/zulip,timabbott/zulip,zulip/zulip,punchagan/zulip,showell/zulip,kou/zulip,andersk/zulip,shubhamdhama/zulip,zulip/zulip,punchagan/zulip,rht/zulip,hackerkid/zulip,hackerkid/zulip,synicalsyntax/zulip,zulip/zulip,andersk/zulip,kou/zulip,zulip/zulip,kou/zulip,timabbott/zulip,brainwane/zulip,eeshangarg/zulip,andersk/zulip,brainwane/zulip,showell/zulip,andersk/zulip,shubhamdhama/zulip,eeshangarg/zulip,andersk/zulip,hackerkid/zulip,timabbott/zulip,synicalsyntax/zulip,shubhamdhama/zulip,shubhamdhama/zulip,zulip/zulip,eeshangarg/zulip,brainwane/zulip,punchagan/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,showell/zulip,synicalsyntax/zulip,hackerkid/zulip,punchagan/zulip,rht/zulip