Auto merge of #5456 - Shekharrajak:5452_bundle_inject_options, r=colby-swandale

`bundle inject` with source and group options

Fixes https://github.com/bundler/bundler/issues/5452

Eg

```
$ bundle inject "bootstrap" ">0" --source=https://rubygems.org --group=development
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Fetching gem metadata from https://rubygems.org/.............
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Added to Gemfile:
  bootstrap (> 0), group => [:development], :source => 'https://rubygems.org'
```

In GemFile

```
gem 'bootstrap', '> 0', :group => [:development], :source => 'https://rubygems.org'
```

### Multiple group :

```
$ dbundle inject "bootstrap" ">0" --source=https://rubygems.org --group=development,production
Fetching gem metadata from https://rubygems.org/............

Added to Gemfile:
gem 'bootstrap', '> 0', :group => [:development, :production], :source => 'https://rubygems.org'

```
In gemfile

```
# Added at 2017-03-24 11:40:51 +0530 by shekharrajak:
gem 'bootstrap', '> 0', :group => [:development, :production], :source => 'https://rubygems.org'
```

1 files changed, 25 insertions, 0 deletions

diff --git a/spec/commands/inject_spec.rb b/spec/commands/inject_spec.rb
index dd5e22498b..5c711b32a0 100644
--- a/spec/commands/inject_spec.rb
+++ b/spec/commands/inject_spec.rb
@@ -52,6 +52,31 @@ Usage: "bundle inject GEM VERSION"
     end
   end
 
+  context "with source option" do
+    it "add gem with source option in gemfile" do
+      bundle "inject 'foo' '>0' --source file://#{gem_repo1}"
+      gemfile = bundled_app("Gemfile").read
+      str = "gem 'foo', '> 0', :source => 'file://#{gem_repo1}'"
+      expect(gemfile).to include str
+    end
+  end
+
+  context "with group option" do
+    it "add gem with group option in gemfile" do
+      bundle "inject 'rack-obama' '>0' --group=development"
+      gemfile = bundled_app("Gemfile").read
+      str = "gem 'rack-obama', '> 0', :group => [:development]"
+      expect(gemfile).to include str
+    end
+
+    it "add gem with multiple groups in gemfile" do
+      bundle "inject 'rack-obama' '>0' --group=development,test"
+      gemfile = bundled_app("Gemfile").read
+      str = "gem 'rack-obama', '> 0', :groups => [:development, :test]"
+      expect(gemfile).to include str
+    end
+  end
+
   context "when frozen" do
     before do
       bundle "install"