fix(contrib/coreos): bump timeouts for etcd and fleet

See discussion in https://github.com/deis/deis/issues/1688
Merge pull request #1689 from carmstrong/1688-bump_etcd_timeout

fix(contrib/coreos): bump timeouts for etcd and fleet
ref(tests): move test scripts under tests/bin

There are several shell scripts in the $PATH on the CI nodes and
also defined in Jenkins jobs directly. This moves them to a central
location under version control for maintainability.
Merge pull request #1702 from mboersma/test-scripts-in-git

ref(tests): move test scripts under tests/bin