make the fetching of user info generic so that bceid users can get it from db/any other source

## What is the problem?
* the current fetching of user in sbc-auth using keycloakservice in sbc-common-compoennts .This brings hard dependency where bceid users need this information from database instead of keycloak.

```
@Action({ commit: 'setCurrentUser' })
public loadUserInfo () {
// Load User Info
return KeyCloakService.getUserInfo()
}

```

## What is the impact?
*
bceid users fetching logic is impacted

## Proposed solution
*TBD