Allow Wait Active timeout and retry interval to be configurable

[nathairtras]

The hard-coded value of 3.33 minutes is too short for our environment. Allowing the end user to configure this value would help in dealing with less-than-optimal hosting arrangements. Allowing the retry to be increased is nice in cases where you know you will need to wait for a while - it could either be set dynamically based upon the timeout, or manually entered.

Impacted file:
source/lib/vagrant-openstack-provider/action/wait_active.rb

Vagrant 1.6.5
vagrant-openstack-provider 0.6.0

[julienvey]

Sure, both retry_interval and timeout should be configurable.
Not only for WaitForServerToBeActive but also for WaitForServerToStop

This is also related to a discussion we had in #170 where we planned to refactor these actions in a more generic WaitFor..X..ToBe..Y..

[vinsh]

Good work on this feature! Thanks!