[google] Instances are created without description, and disk size is ignored

Handle hash merge! properly

lib/fog/google/models/storage/file.rb

@@ -121,7 +121,7 @@ module Fog
           options['Content-MD5'] = content_md5 if content_md5
           options['Content-Type'] = content_type if content_type
           options['Expires'] = expires if expires
-          options.merge(metadata)
+          options.merge!(metadata)
 
           data = service.put_object(directory.key, key, body, options)
           merge_attributes(data.headers.reject {|key, value| ['Content-Length', 'Content-Type'].include?(key)})

lib/fog/google/models/storage/files.rb

@@ -93,7 +93,7 @@ module Fog
 
         def new(attributes = {})
           requires :directory
-          super({ :directory => directory }.merge!(attributes))
+          super({ :directory => directory }.merge(attributes))
         end
 
       end

lib/fog/google/requests/compute/insert_disk.rb

@@ -78,7 +78,7 @@ module Fog
           end
 
           # Merge in any remaining options (only 'description' should remain)
-          body_object.merge(opts)
+          body_object.merge!(opts)
 
           result = self.build_result(api_method, parameters,
                                      body_object)

lib/fog/google/requests/compute/insert_image.rb

@@ -30,7 +30,7 @@ module Fog
           }
 
           # Merge in the remaining params (only 'description' should remain)
-          body_object.merge(options)
+          body_object.merge!(options)
 
           result = self.build_result(api_method,
                                      parameters,

lib/fog/google/requests/compute/insert_server.rb

@@ -174,7 +174,7 @@ module Fog
           if options['kernel']
             body_object['kernel'] = @api_url + "google/global/kernels/#{options.delete 'kernel'}"
           end
-          body_object.merge! options # Adds in all remaining options that weren't explicitly handled.
+          body_object.merge!(options) # Adds in all remaining options that weren't explicitly handled.
 
           result = self.build_result(api_method, parameters,
                                      body_object=body_object)

lib/fog/google/requests/storage/copy_object.rb

@@ -26,7 +26,7 @@ module Fog
         #     * 'LastModified'<~Time> - date object was last modified
         #
         def copy_object(source_bucket_name, source_object_name, target_bucket_name, target_object_name, options = {})
-          headers = { 'x-goog-copy-source' => "/#{source_bucket_name}/#{source_object_name}" }.merge!(options)
+          headers = { 'x-goog-copy-source' => "/#{source_bucket_name}/#{source_object_name}" }.merge(options)
           request({
             :expects  => 200,
             :headers  => headers,