REGISTRAR: fixed behavior for group applications with auto-approve

- Do not throw exceptions when user submits application for group
  with auto-approve and is not member of VO yet. Do not send
  notification to VO admin either.
- When user's application for VO is approved, check for his group
  applications in same VO with auto-approve and try to approve them.
  Get applications based on user and all his identities.

- Trigger member's validation only once - after all applications
  are processed.
REGISTRAR: fixed behavior for group applications with auto-approve

- Do not throw exception when approving of group application fails
  to allow VO application to be successfully approved.
- Fixed javadoc.
- Skip approving NEW applications, since they will be approved once
  user verify his email address.
- Fixed SQL.
REGISTRAR: optimization

- Save up 1 DB query when auto-approving application.
Merge pull request #358 from zlamalp/registrar

REGISTRAR: fixed behavior for group applications with auto-approve

- Do not try to (auto-)approve applications for group when user is not member of VO.
- When VO admin approves VO application, then try to approve all user's group
  applications with auto-approve mode (search by user-ext-source too, to get
  all applications of user which was submited before user creation). Skip NEW
  applications, they will be approved once user verify his email.