Update api client of ruby client.

Update ApiClient#build_request, change `@verify_ssl`, `@ssl_ca_cert`, `@debugging`
to `Configuration.verify_ssl`, `Configuration.ssl_ca_cert`, `Configuration.debugging`.

Author: geekerzp

modules/swagger-codegen/src/main/resources/ruby/api_client.mustache

@@ -69,9 +69,9 @@ module {{moduleName}}
         :method => http_method,
         :headers => header_params,
         :params => query_params,
-        :ssl_verifypeer => @verify_ssl,
-        :cainfo => @ssl_ca_cert,
-        :verbose => @debugging
+        :ssl_verifypeer => Configuration.verify_ssl,
+        :cainfo => Configuration.ssl_ca_cert,
+        :verbose => Configuration.debugging
       }
 
       if [:post, :patch, :put, :delete].include?(http_method)

samples/client/petstore/ruby/lib/petstore/api_client.rb

@@ -69,9 +69,9 @@ def build_request(http_method, path, opts = {})
         :method => http_method,
         :headers => header_params,
         :params => query_params,
-        :ssl_verifypeer => @verify_ssl,
-        :cainfo => @ssl_ca_cert,
-        :verbose => @debugging
+        :ssl_verifypeer => Configuration.verify_ssl,
+        :cainfo => Configuration.ssl_ca_cert,
+        :verbose => Configuration.debugging
       }
 
       if [:post, :patch, :put, :delete].include?(http_method)