Remove Gemfile.lock and adding it to .gitignore (#1257)

.gitignore

@@ -188,3 +188,6 @@ src/generator/AutoRest.Ruby*/*/RspecTests/Generated/*
 dnx-clr-win-x86*/
 dnx-coreclr-win-x86*/
 /dnx
+
+# Gemfile.lock
+Gemfile.lock

Gemfile.lock

@@ -1,51 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    concurrent-ruby (1.0.0)
-    concurrent-ruby-ext (1.0.0)
-      concurrent-ruby (~> 1.0.0)
-    concurrent-ruby-ext (1.0.0-x86-mingw32)
-      concurrent-ruby (~> 1.0.0)
-    diff-lcs (1.2.5)
-    domain_name (0.5.25)
-      unf (>= 0.0.5, < 1.0.0)
-    faraday (0.9.2)
-      multipart-post (>= 1.2, < 3)
-    faraday-cookie_jar (0.0.6)
-      faraday (>= 0.7.4)
-      http-cookie (~> 1.0.0)
-    http-cookie (1.0.2)
-      domain_name (~> 0.5)
-    json (1.8.3)
-    multipart-post (2.0.0)
-    rspec (3.4.0)
-      rspec-core (~> 3.4.0)
-      rspec-expectations (~> 3.4.0)
-      rspec-mocks (~> 3.4.0)
-    rspec-core (3.4.1)
-      rspec-support (~> 3.4.0)
-    rspec-expectations (3.4.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-mocks (3.4.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-support (3.4.1)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.7.1)
-    unf_ext (0.0.7.1-x86-mingw32)
-
-PLATFORMS
-  ruby
-  x86-mingw32
-
-DEPENDENCIES
-  concurrent-ruby-ext
-  faraday
-  faraday-cookie_jar
-  json
-  rspec
-
-BUNDLED WITH
-   1.10.6