[stager] remove vendor cache from stager

  This change replaces vendor cache with git references.
  Bumped vcap-concurrency to 0.1.0 which has a valid gemspec.
  For this to deploy with BOSH the packaging scripts need to be changed,
c.f. Change I619c9a228b666dcd9e14b4bb6e24b89e5864f7d7.

  Test plan: create a release and pass BVT using Change I619c9a22 of
cf-release.

Change-Id: I849da047b37ac05220c6508869a34a94a8bf4f8c

Gemfile

@@ -1,15 +1,15 @@
 source :rubygems
 
-gem 'eventmachine'
+gem 'eventmachine', :git => 'git://github.com/cloudfoundry/eventmachine.git', :branch => 'release-0.12.11-cf'
 gem 'nats'
 gem 'rake'
 gem 'yajl-ruby', '>= 0.7.9'
 
-gem 'vcap_common', '~> 1.0.8'
-gem 'vcap_logging', '>= 0.1.3'
-gem 'vcap_staging', '~> 0.1.59'
-gem 'vcap-concurrency', '~> 0.0.1'
-gem 'stager-client', '~> 0.0.2'
+gem 'vcap_common', '~> 1.0.8', :git => 'git://github.com/cloudfoundry/vcap-common.git', :ref => 'f6ffe9ad'
+gem 'vcap_logging', '>= 0.1.3', :git => 'git://github.com/cloudfoundry/common.git'
+gem 'vcap_staging', '~> 0.1.59', :git => 'git://github.com/cloudfoundry/vcap-staging.git', :ref => '251cb526'
+gem 'vcap-concurrency', '~> 0.1.0', :git => 'git://github.com/cloudfoundry/vcap-concurrency.git'
+gem 'stager-client', '~> 0.0.2', :git => 'git://github.com/cloudfoundry/stager-client.git'
 
 group :test do
   gem 'rspec'

Gemfile.lock

@@ -1,3 +1,57 @@
+GIT
+  remote: git://github.com/cloudfoundry/common.git
+  revision: b96ec1192d961925d91e17ca3831f8547489d918
+  specs:
+    vcap_logging (1.0.2)
+      rake
+
+GIT
+  remote: git://github.com/cloudfoundry/eventmachine.git
+  revision: 2806c630d8631d5dcf9fb2555f665b829052aabe
+  branch: release-0.12.11-cf
+  specs:
+    eventmachine (0.12.11.cloudfoundry.3)
+
+GIT
+  remote: git://github.com/cloudfoundry/stager-client.git
+  revision: fdaae720264e43cf7b1d068fcac27b005517d922
+  specs:
+    stager-client (0.0.2)
+      eventmachine
+      nats
+      yajl-ruby
+
+GIT
+  remote: git://github.com/cloudfoundry/vcap-common.git
+  revision: f6ffe9add54b55eaf428556147d61f3d64508cd8
+  ref: f6ffe9ad
+  specs:
+    vcap_common (1.0.9)
+      eventmachine (~> 0.12.11.cloudfoundry.3)
+      nats (~> 0.4.22.beta.8)
+      posix-spawn (~> 0.3.6)
+      thin (~> 1.3.1)
+      yajl-ruby (~> 0.8.3)
+
+GIT
+  remote: git://github.com/cloudfoundry/vcap-concurrency.git
+  revision: be2bdb9f64a066f268d7537223ee24ae18e03cf7
+  specs:
+    vcap-concurrency (0.1.0)
+
+GIT
+  remote: git://github.com/cloudfoundry/vcap-staging.git
+  revision: 251cb526ea26961bfc46efdea7f8268510e32e25
+  ref: 251cb526
+  specs:
+    vcap_staging (0.1.59)
+      nokogiri (>= 1.4.4)
+      rake
+      rspec
+      uuidtools (~> 2.1.2)
+      vcap_common (~> 1.0.8)
+      yajl-ruby (>= 0.7.9)
+
 GEM
   remote: http://rubygems.org/
   specs:
@@ -8,7 +62,6 @@ GEM
     crack (0.1.8)
     daemons (1.1.8)
     diff-lcs (1.1.3)
-    eventmachine (0.12.11.cloudfoundry.3)
     json_pure (1.6.5)
     nats (0.4.22)
       daemons (>= 1.1.4)
@@ -30,32 +83,12 @@ GEM
     sinatra (1.2.6)
       rack (~> 1.1)
       tilt (>= 1.2.2, < 2.0)
-    stager-client (0.0.2)
-      eventmachine
-      nats
-      yajl-ruby
     thin (1.3.1)
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
     tilt (1.3.2)
     uuidtools (2.1.2)
-    vcap-concurrency (0.0.1)
-    vcap_common (1.0.9)
-      eventmachine (~> 0.12.11.cloudfoundry.3)
-      nats (~> 0.4.22.beta.8)
-      posix-spawn (~> 0.3.6)
-      thin (~> 1.3.1)
-      yajl-ruby (~> 0.8.3)
-    vcap_logging (1.0.1)
-      rake
-    vcap_staging (0.1.59)
-      nokogiri (>= 1.4.4)
-      rake
-      rspec
-      uuidtools (~> 2.1.2)
-      vcap_common (~> 1.0.8)
-      yajl-ruby (>= 0.7.9)
     webmock (1.7.4)
       addressable (~> 2.2, > 2.2.5)
       crack (>= 0.1.7)
@@ -66,15 +99,15 @@ PLATFORMS
 
 DEPENDENCIES
   ci_reporter
-  eventmachine
+  eventmachine!
   nats
   rake
   rspec
   sinatra
-  stager-client (~> 0.0.2)
-  vcap-concurrency (~> 0.0.1)
-  vcap_common (~> 1.0.8)
-  vcap_logging (>= 0.1.3)
-  vcap_staging (~> 0.1.59)
+  stager-client (~> 0.0.2)!
+  vcap-concurrency (~> 0.1.0)!
+  vcap_common (~> 1.0.8)!
+  vcap_logging (>= 0.1.3)!
+  vcap_staging (~> 0.1.59)!
   webmock
   yajl-ruby (>= 0.7.9)