Update to bundler.d to match other smart proxy plugins

Author: ehelms

bundler.plugins.d/remote_execution_ssh.rb bundler.d/remote_execution_ssh.rbbundler.plugins.d/remote_execution_ssh.rb renamed to bundler.d/remote_execution_ssh.rb

@@ -15,7 +15,7 @@ Gem::Specification.new do |gem|
 
   gem.files            = Dir['lib/smart_proxy_remote_execution_ssh.rb', 'LICENSE', 'README.md',
                              '{lib/smart_proxy_remote_execution_ssh,settings.d}/**/*',
-                             'bundler.plugins.d/remote_execution_ssh.rb']
+                             'bundler.d/remote_execution_ssh.rb']
   gem.extra_rdoc_files = ['README.md', 'LICENSE']
   gem.test_files       = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths    = ["lib"]