Security: user can see password for services of admin

[Timur Nurlygayanov]

*Step To Reproduce*

1. Get valid X-Auth-Token with admin rules
2. Via REST API: Create environment, create session, create any service, deploy session
3. Get valid X-Auth-Token with user rules
4. Get deployments info (http://ip:8082/environments/env_id/deployments)

*Observed result*
In response user can find password for services of admin:
{code}{u'deployments': [{u'updated':....., u'services': [u'adminPassword': u'P@ssw0rd', u'credentials': {u'username': u'Administrator', u'password': u'P@ssw0rd', .....}, ....}]}{code}