* Refactor configmap by using implicit default values

Instead of having every default value explicitly described in the values file and put into the corresponding configmap(s), just use defaults and adjust these values as needed. This is beneficial because overtime defaults may change and it is duplicate work to match it in the values file. Furthermore documenting configurable values in the README will be much more feasible. This PR also removes the now defunct admin section of the config.
Signed-off-by: Naseem <naseem@transit.app>

* Rename config to configmap
Signed-off-by: Naseem <naseem@transit.app>

* enable api and rpc ports always
Signed-off-by: Naseem <naseem@transit.app>