mussel: remove -s and -H ${http_header} in v12.03 driver.
mussel: move xcreate procedure to cmd_xcreate().
mussel: remove -s and -H ${http_header} in v11.12 driver.
mussel: add xcreate command to load_balancer image backup_object host_node storage_node network security_group and ssh_key_pair.
mussel,test: remove networking case. because current call_api() use "-H ..." and no need to connect to outside resource.
mussel,test: add xcreate to help command test.
mussel: add backup_object to MUSSEL_RESOURCES to run test.
mussel,test: add Makefile to run test.
Merge pull request #164 from axsh/feature-mussel-xcreate-command

Feature mussel xcreate command