Remove Gemfile.lock from repo

Author: constantine-nikolaou

.gitignore

@@ -9,6 +9,9 @@
 # Ignore bundler config.
 /.bundle
 
+# Ignore Gemfile.lock
+/Gemfile.lock
+
 # Ignore all logfiles and tempfiles.
 /log/*
 /tmp/*
@@ -67,4 +70,4 @@ jenkins-ci.sh
 /provisioning/
 /ansible-rails/
 Vagrantfile
-/spec/support/api/*
+/spec/support/api/*