TMA-666: Generate junit-formatted test results

Author: panjan

.gitignore

@@ -35,3 +35,4 @@ Gemfile.lock
 
 # Temp files
 tmp/
+junit.xml

.rspec

@@ -1,3 +1,5 @@
 --color
 --format documentation
 --require spec_helper
+--format RspecJunitFormatter
+--out junit.xml

gooddata.gemspec

@@ -34,6 +34,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'redcarpet', '~> 3.1' if RUBY_PLATFORM != 'java'
   s.add_development_dependency 'rspec', '~> 3.5'
   s.add_development_dependency 'rspec-expectations', '~> 3.5'
+  s.add_development_dependency 'rspec_junit_formatter', '~> 0.3.0'
   s.add_development_dependency 'rubocop', '< 0.48' # TODO: remove it after dealing with new rules introduced in 0.48 version
   s.add_development_dependency 'simplecov', '~> 0.12'
   s.add_development_dependency 'webmock', '~> 1.21'