JCLOUDS-611: Neutron LBaaS (version 1) extension request

https://issues.apache.org/jira/browse/JCLOUDS-611

main:
- Added getLBaaSv1Api in NeutronApi interface
- Added LBaaS v1 alias in NeutronHttpApiModule class
- Added LBaaS v1 extension in ExtensionNamespaces class
- Added domain/lbaas/v1 package
- Added extensions/lbaas/v1 package
- Added fallbacks/lbaas/v1 package
- Added functions/lbaas/v1 package

tests:
- Added extensions/lbaas/v1 package
- Added resources/extension_list_with_lbaas_v1_response.json
- Added resources/extension_list_without_lbaas_v1_response.json
- Added resources/lbaas/v1 package
I think <code>isXXX()</code> is only for <code>boolean</code> properties, <code>getXXX()</code> should be used for <code>Boolean</code>. This is because <code>getAdminStateUp()</code> can return 3 values: <code>null</code>, <code>Boolean.TRUE</code> or <code>Boolean.FALSE</code>.
http://download.oracle.com/otndocs/jcp/7224-javabeans-1.01-fr-spec-oth-JSpec/
http://blog.950buy.com/article/javabean-specification-on-a-few-you-should-know/