Porting changes from Release 0.2

* Fix leaking password in murano-api logs (resolved: MRN-861)
* Added function to clean deployment description
* Updated SQLAlchemy requirement
* Changed default values of vhost, login, password (resolved: MRN-880)
* Updated requirements for murano-common
  Now murano-common is installed from pypi and has correct version requirements

Change-Id: I765808820b0ccbdb1d24c776cbe674c00822a3e4