Deterministic startup for resourceSourceMappings

Deterministic startup for resourceSourceMappings

also fix a typo in property name

resourceSourceMappings is required for loading the resources
(templates, DDs, blueprint), but the bean initializing its values
was getting instantiated after the resources loading process, ending
 up failing loading the resources.

Mkaing DataBaseInitService dependent on the ApplicationRegistrationService
bean will force SpringBoot to have the dependsOn bean loaded before the one
declaring the dependency.

Change-Id: Id9781057132ddab51ed5a79143d92436304e6b55
Issue-ID: CCSDK-650
Signed-off-by: Alexis de Talhouët <adetalhouet89@gmail.com>