Disable EIP if need login before to be usable.
Remove unused execution path.
Add providers even if the wizard is rejected.
Disable the EIP start if EIP is disabled.
Remove unused import.
Disable eip-config for uninitialized providers.

- Show the user which provider has not been initialized and disable its
  usage.
- Add support for absolute path in get_eipconfig_path.
- Replace hadr-coded paths with get_eipconfig_path.
Add changes file for #4523, #4555, #4422.
Merge remote-tracking branch 'ivan/bug/eip-disabled-until-usable' into develop