* refactor: Factor our OpenIdConnectionManager class and deprecate old methods
* refactor: Refactor keycloak uma client to use openid connection manager
* fix: Perform token renewal at 90% of lifetime
* refactor: Add optional openid connection constructor param to keycloak admin
* refactor: Remove auto_refresh_token in favour of automatic refresh on expiry
* refactor: move KeycloakOpenIDConnectionManager to a separate file
* docs: uma additions and fixes
* refactor: rename token_renewal_fraction->token_lifetime_fraction
* refactor: shorten KeycloakOpenIDConnectionManager->KeycloakOpenIDConnection
* docs: incorporate review comments
Remove the necessity for supplying client name for create a new client
request, also don't check existing clients based on client name as those
can be duplicate
BREAKING CHANGE: Renamed parameter client_name to client_id in get_client_id method
Closes#351
Nuwan Goonasekera
Richard Nemeth