move fluentd plugins to vdc-fluentd/.
update rpmspec to bundle vdc-fluentd.
Merge pull request #316 from axsh/external-ip-testing

mussel,test: add ip_pool/ip_handle rw tests.
Merge pull request #317 from axsh/repackaging-fluentd

Bundle fluentd and set of plugins to wakame-vdc.rpm.
mussel,test: add extended hash test.
mussel,test: add "add_args_param" test.
mussel,functions: replace echo with urlencode_data().
Merge pull request #318 from axsh/mussel-functions-testing

Mussel functions testing
mussel: enable to set network_id with vifs_eth0_network_id shell-variable.
Merge pull request #319 from axsh/ip-pool-rw-testing

mussel: enable to set network_id with vifs_eth0_network_id shell-variabl...
mussel,test: first natbox acceptance test.