Bump colorize to ~> 0.7.0

Also removes `colored` which came in during the CI merge and is
redundant.

Closes #2822

Gemfile

@@ -125,8 +125,7 @@ gem 'sidetiq', '~> 0.6.3'
 gem "httparty", '~> 0.13.3'
 
 # Colored output to console
-gem "colored", '~> 1.2'
-gem "colorize", '~> 0.5.8'
+gem "colorize", '~> 0.7.0'
 
 # GitLab settings
 gem 'settingslogic', '~> 2.0.9'

Gemfile.lock

@@ -123,8 +123,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.9.1.1)
-    colored (1.2)
-    colorize (0.5.8)
+    colorize (0.7.7)
     connection_pool (2.2.0)
     coveralls (0.8.2)
       json (~> 1.8)
@@ -813,8 +812,7 @@ DEPENDENCIES
   carrierwave (~> 0.9.0)
   charlock_holmes (~> 0.7.3)
   coffee-rails (~> 4.1.0)
-  colored (~> 1.2)
-  colorize (~> 0.5.8)
+  colorize (~> 0.7.0)
   coveralls (~> 0.8.2)
   creole (~> 0.3.6)
   d3_rails (~> 3.5.5)