cmd/jujud tests have stopped passing

[David Cheney]

Rev 780 broke the build. I will propose a revert to get the build passing for the 1.9.4 release 



[LOG] 88.02544 JUJU:DEBUG state/watcher: got request: watcher.reqWatch{key:watcher.watchKey{c:"machines", id:"1"}, info:watcher.watchInfo{ch:(chan<- watcher.Change)(0xc200418a80), revno:3}}
[LOG] 90.99889 JUJU cmd/jujud: rerunning machiner
[LOG] 90.99898 JUJU cmd/jujud: machine agent starting
[LOG] 90.99913 JUJU state: opening state; mongo addresses: ["localhost:45695"]
[LOG] 90.99995 JUJU state: connecting to 127.0.0.1:45695
[LOG] 91.00351 JUJU state: connection established
[LOG] 91.00633 JUJU state: opening state; mongo addresses: ["localhost:45695"]
[LOG] 91.00729 JUJU state: connecting to 127.0.0.1:45695
[LOG] 91.01030 JUJU state: connection established
[LOG] 91.01252 JUJU cmd/jujud: unauthorized access
[LOG] 93.02322 JUJU:DEBUG state/watcher: loading new events from changelog collection...
[LOG] 94.01312 JUJU cmd/jujud: rerunning machiner
[LOG] 94.01321 JUJU cmd/jujud: machine agent starting
[LOG] 94.01335 JUJU state: opening state; mongo addresses: ["localhost:45695"]
[LOG] 94.01407 JUJU state: connecting to 127.0.0.1:45695
[LOG] 94.01727 JUJU state: connection established
[LOG] 94.01997 JUJU state: opening state; mongo addresses: ["localhost:45695"]
[LOG] 94.02072 JUJU state: connecting to 127.0.0.1:45695
[LOG] 94.02361 JUJU state: connection established
[LOG] 94.02602 JUJU cmd/jujud: unauthorized access