Setup and run in a virtual environment

Using tox, developers can down drop into an environment
which sets up and runs gluster-swift with gswauth authentication.
The developer is then dropped into a shell which is running inside
the tox environment.  OpenStack Swift and Gluster-Swift are
available to the developer.  Once the developer exists the shell,
the environment will be cleaned up and terminated.

Usage:
tox -e run

Example:
$ tox -e run
GLOB sdist-make: /home/lpabon/gluster-swift/setup.py
run inst-nodeps: /home/lpabon/gluster-swift/.tox/dist/gluster_swift-1.10.1-0.zip
run runtests: commands[0] | bash tools/tox_run.sh
Ring files are prepared in /etc/swift. Please restart object store services
Redirecting to /bin/systemctl start  memcached.service
Starting proxy-server...(/etc/swift/proxy-server.conf)
Starting container-server...(/etc/swift/container-server.conf)
Starting account-server...(/etc/swift/account-server.conf)
Starting object-server...(/etc/swift/object-server.conf)
bash-4.2$ swauth-list -K gswauthkey
{"accounts": [{"name": "test"}, {"name": "test2"}]}
bash-4.2$ swauth-list -K gswauthkey test
{"services": {"storage": {"default": "local", "local":
"http://127.0.0.1:8080/v1/AUTH_test"}}, "account_id":
"AUTH_test", "users": [{"name": "tester"}, {"name": "tester3"}]}
bash-4.2$ swauth-list -K gswauthkey test tester
{"groups": [{"name": "test:tester"}, {"name": "test"},
{"name": ".admin"}], "auth": "plaintext:testing"}
bash-4.2$ exit
exit
Redirecting to /bin/systemctl stop  memcached.service
Signal proxy-server  pid: 22862  signal: 15
Signal container-server  pid: 22863  signal: 15
Signal account-server  pid: 22864  signal: 15
Signal object-server  pid: 22865  signal: 15
proxy-server (22862) appears to have stopped
container-server (22863) appears to have stopped
account-server (22864) appears to have stopped
object-server (22865) appears to have stopped
  run: commands succeeded
    congratulations :)

Change-Id: I98de5d1b1698b4cd355888f2c15a46df021a9e87
Signed-off-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/6365
Reviewed-by: pushpesh sharma <psharma@redhat.com>
Tested-by: pushpesh sharma <psharma@redhat.com>
Reviewed-on: http://review.gluster.org/6371