Create a script to inizialize Keycloak
This PR adds a keycloak initialization script (issue #77 (closed)) and a sample script to populate the realms.
- Initialization script:
custodian/src/demo/KeycloakInitialization/keycloak_init_script.sh
- Populate script:
custodian/src/demo/KeycloakInitialization/populate.sh
It also fixes some typos and errors and adds an endpoint in the IMS to get a user access token.