Nova-Dashboard launch failed with error "An unexpected error occurred while processing your request. Please try your request again."

[hgaikwad]

Description:
Nova-Dashboard launch failed with error "An unexpected error occurred while processing your request. Please try your request again."

Version/Build: betty_openstack-os-build.2561.dev

Browsers Used: IE11.0

Reproduction Steps:

1. Install crowbar.
2. After crowbar installation, start adding nodes to the crowbar server network.
3. The nodes would PXE boot and show up into the node dashboard for deployment.
4. Create all the barclamp proposals.
5. Lastly have the barclamp proposal created for Nova-Dashboard.
6. Once the Nova-Dashboard proposal is being applied successfuly, try opening the Nova-Dashboard.
7. Login to the Nova-Dashboard using the default admin user.
8. The Nova-Dashboard does not show up with the error "An unexpected error occurred while processing your request. Please try your request again."
9. Inspite of multiple trials, it still shows the same error everytime

Observed Results:
Nova-Dashboard launch failed with error "An unexpected error occurred while processing your request. Please try your request again."

Expected Results:
Nova-Dashboard should be launched and shown successfully without any error, if it is installed without any error.

Impact:
User cannot perform any actions, since the Nova-Dashboard GUI itself does not come up.