[puppetlabs#1058] Add acceptance test for repeated git remote

This commit adds a beaker acceptance test verifying that it is possible
to use the same remote for several non-module objects. This case
previously broke when the `pool_size` feature was introduced, because
there was a race condition when creating the git cache in shellgit mode,
when the same remote was used in two objects being set up concurrently.

integration/tests/git_source/git_source_repeated_remote.rb

@@ -0,0 +1,68 @@
+require 'git_utils'
+require 'r10k_utils'
+require 'master_manipulator'
+test_name 'Verify the same remote can be used in more than one object'
+
+env_path = on(master, puppet('config print environmentpath')).stdout.rstrip
+r10k_fqp = get_r10k_fqp(master)
+git_environments_path = '/root/environments'
+git_repo_path = '/git_repos'
+git_repo_name = 'environments'
+git_control_remote = File.join(git_repo_path, "#{git_repo_name}.git")
+code_dir = '/etc/puppetlabs/code/environments/production'
+
+last_commit = git_last_commit(master, git_environments_path)
+git_provider = ENV['GIT_PROVIDER']
+r10k_config_path = get_r10k_config_file_path(master)
+r10k_config_bak_path = "#{r10k_config_path}.bak"
+#In-line files
+r10k_conf = <<-CONF
+cachedir: '/var/cache/r10k'
+git:
+  provider: '#{git_provider}'
+sources:
+  control:
+    basedir: "#{env_path}"
+    remote: "#{git_control_remote}"
+CONF
+
+# Install the same module in two different places
+puppetfile = <<-EOS
+mod 'prod_apache',
+  :git => 'git://github.com/puppetlabs/puppetlabs-apache.git',
+  :branch => 'master'
+
+mod 'test_apache',
+  :git => 'git://github.com/puppetlabs/puppetlabs-apache.git',
+  :branch => 'master'
+EOS
+
+teardown do
+  step 'Restore Original "r10k" Config'
+  on(master, "mv #{r10k_config_bak_path} #{r10k_config_path}")
+
+  clean_up_r10k(master, last_commit, git_environments_path)
+end
+
+step 'Stub the forge'
+stub_forge_on(master)
+
+step 'Backup Current "r10k" Config'
+on(master, "mv #{r10k_config_path} #{r10k_config_bak_path}")
+
+step 'Update the "r10k" Config'
+create_remote_file(master, r10k_config_path, r10k_conf)
+
+step 'Ask r10k to deploy'
+on(master, "#{r10k_fqp} deploy environment -p")
+
+step 'Add puppetfile with repeated remote'
+create_remote_file(master, "#{git_environments_path}/Puppetfile", puppetfile)
+git_add_commit_push(master, 'production', 'add Puppetfile', git_environments_path)
+
+step 'Deploy r10k'
+on(master, "#{r10k_fqp} deploy environment -p")
+
+step 'Verify module was installed in both places'
+on(master, "test -d #{code_dir}/modules/prod_apache")
+on(master, "test -d #{code_dir}/modules/test_apache")