Remove rack-mini-profiler from Gemfile.lock

This isn't in our Gemfile, and none of the things that are have it as a
dependency, so it doesn't belong in our Gemfile.lock. I'm guessing this
was committed accidentally.

Change-Id: I75ae539ee517e48d8ae5380a5a22dd54323a7ed1
Update aws-sdk gem 1.36.1 -> 1.37.0

Change-Id: I718b15010d7b8408c4f86aba57c0e5b806220215
Update compass 0.12.3 -> 0.12.4, sass 3.2.14 -> 3.2.18

Change-Id: Idbb7e712d754702607e2c862a6f23471c03ea0b8
Update multi_json 1.9.0 -> 1.9.2

Change-Id: I99653752c716e89d83f9842aa73c31769e247f82
Update rspec-rails 2.14.1 -> 2.14.2, and dependencies

Change-Id: Ic6929c474ea978094a669a824e75a303a36fbeba
Update compass-rails 1.1.6 -> 1.1.7

Change-Id: I167ded75f7445dc933f976d0c98a969c2e7e20f7
Fix broken SnapshotsController specs

In 6698b9b2da677bd4bde9 I removed a bit of text that caused these specs
to fail, but I had failed to notice that had happened. This commit
follows up by removing the respective tests from the specs.

Change-Id: Ia38b8b50dee76836c60c6be08094943f1be8c375