application.yaml discouraged + NPE if no configuration

[ikucuze]

rafactor 7a8fbbe introduced an 'application.yaml' config file in springboot module.

Importing this dependency in a project having an application.yaml will mask the dependency one, so the configs in CamundaAutodeploymentProperties will be null.

This produces a NullPointer in CamundaProcessAutodeployment.deployCamundaResources(), due to auto unboxing of if (!properties.getEnabled()).

Hence, the behavior is different, depending on the project which import the dependency.

Defaults should be set in ConfigurationProperties file.

[ikucuze]

fix by PR #153