Apply user project limit only for personal projects. We should not include group projects for user limit

Since masters_projects does not cover most of cases now we use authorized_projects for DeployKey read access

Improve query of authorized_projects. Cache results for authorized_groups, authorized_projects methods

500 error was occured in the following steps:

1. user1 creates new team "team1".
2. Assign team1 to project1.
3. Sign in as admin. This admin is not a member of team1.
4. Open project1 team setting page (/project1/team).
5. Click "team1" link in "Assigned teams" area.
6. 500 error.

Fixed this issue.

Add api to collect owned user projects. Api deploy_key.create: Enable deploy key if it exist in other owned project

“Can create groups” and “Can create teams” had hardcoded defaults to
`true`. Sometimes it is desirable to prohibit these for newly created
users by default.