Update rspec-mocks gem 2.14.5 -> 2.14.6

Change-Id: I62c509b2247c6260091b55ffdcb78bc6e743bedd
Update metaclass 0.0.2 -> 0.0.4

This is a dependency of the mocha gem.

Change-Id: I31a82c827700938aed1aaeb8f718abc28aab3b17
Update sprockets gem 2.10.1 -> 2.11.0

Change-Id: I799885821ca0bb4e43b291fd7a3505e0ff48960c