examije nodes
Allow Ridley to be pooled using an environment variable

Use partial search for finding nodes in environment_manager
Minor changes to `environment examine` command
remove connection pooling of ridley
remove explicit requirement with required_ruby_version
cleanup
Use new ridley-connectors - don't merge til it's out
add config value for connector_pool_size
Merge branch 'testcmd' of github.com:RiotGames/motherbrain into testcmd
Allow setting Ridley's host commander connector pool size via env var

MB_CONNECTOR_POOL is the variable in question
Override config with env var

This is something that is being actively tuned in production envs,
so for the time being use an env var to allow overriding the default
I like finder and hate .DS_Store
Merge branch 'testcmd' of github.com:RiotGames/motherbrain into testcmd
Merge pull request #682 from RiotGames/testcmd

Use partial search in EnvironmentManager#nodes