[aws] mocks and models for SNS
Fix misbehavior around connection to slave node in pool

The idea behind this fix is following:
if u connect to slave node its should notify u where is you master, then
u reconnect to master and perform any actions in front this server
rds event subscriptions
First batch of deprecation of requests in Xenserver
Remove command gem update from travis build

This were being executed to fix an issue related to rubygems
(rubygems/rubygems#763).
This was fixed and merged 1 year ago.
Fixed the issue according pool request #3356
Added more deprecations
Added deprecation notice to destroy requests
Deprecated all requests
Deprecating methods in models
Merge pull request #3355 from engineyard/sns-modeling

SNS/RDS changes
Fix indentation
Merge pull request #1 from plribeiro3000/fix-indentation

Fix indentation
Merge pull request #3356 from oovoo/master

Fix misbehavior around connection to slave node in pool
Merge pull request #3357 from plribeiro3000/deprecate-xenserver-methods

Deprecation of methods in Xenserver
Merge pull request #3359 from plribeiro3000/remove-unecessary-command

Remove command gem update from travis build
Removed Serverlove code
Removed Serverlove tests
Removed Serverlove bin
Added modular Serverlove provider as dependency