Make some gems development-only

We want the :development group to contain gems which are
needed for interactive development but not for automated testing.
This will allow us to exclude them from CI runs, to speed up the
runs, and also work around that the listen gem isn't supported on
old Rubies any more.

Author: Adam Spiers

.travis.yml

@@ -16,7 +16,7 @@ gemfile: crowbar_framework/Gemfile
 
 install:
   - cd crowbar_framework
-  - bin/bundle install
+  - bin/bundle install --without development
   - bin/rake db:create db:migrate
 
 script:

crowbar_framework/Gemfile

@@ -60,15 +60,15 @@ gem "activeresource", "~> 4.0.0",
     require: "active_resource"
 
 unless ENV["PACKAGING"] && ENV["PACKAGING"] == "yes"
-  group :development, :test do
-    gem "brakeman", "~> 2.6.3"
-    gem "rspec-rails", "~> 3.3.0"
+  group :development do
     gem "byebug", "~> 8.2.2"
     gem "derailed_benchmarks", "~> 1.3.0"
     gem "stackprof", "~> 0.2.8"
   end
 
   group :test do
+    gem "rspec-rails", "~> 3.3.0"
+    gem "brakeman", "~> 2.6.3"
     gem "database_cleaner", "~> 1.4.1"
     gem "sinatra", "~> 1.4.5"
     gem "webmock", "~> 1.19.0"