Revert "Bug fix. Escape characters should not be in object names."

This reverts commit cec965b92bfed7c74a4cea842260632ff6f21f93. After talking
with some CF users this change breaks some reasonably named objects,
e.g. objects with the dollar sign. Reopening issue to reduce scope of
disallowed names.
Merge branch 'master' of github.com:cloudfoundry/cloud_controller_ng