Remove references to old picl-idp repo name

Companion bug to Issue #310 

There are a few remaining mentions to `picl-idp` that I'd rather not touch since I'm "unknowledgeable" (to say the least).

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### /loadtest/runbench.sh
https://github.com/mozilla/fxa-auth-server/blob/master/loadtest/runbench.sh#L17

> ./bin/loads-runner --users=20 --duration=300 --external-process-timeout=60 --broker=tcp://localhost:7780 --zmq-publisher=tcp://localhost:7776 --agents=3 --test-runner="/home/app/picl-idp/loadtest/lib/loads.js/runner.js {test}" "/home/app/picl-idp/loadtest/loadtests.js"


### /scripts/awsbox/hekad.toml
https://github.com/mozilla/fxa-auth-server/blob/master/scripts/awsbox/hekad.toml#L12
https://github.com/mozilla/fxa-auth-server/blob/master/scripts/awsbox/hekad.toml#L15
https://github.com/mozilla/fxa-auth-server/blob/master/scripts/awsbox/hekad.toml#L30

> [picl-idp-log] // L12
> logger = "picl-idp" // L15
> App = "picl-idp" // L30


### log.js
https://github.com/mozilla/fxa-auth-server/blob/master/log.js#L43

> name: 'picl-idp',