First round of changes to get the backend app running
* Fixed JDBC and JPA datasource injection issues
* Refactored InformaticaServiceClient to be a Spring service injected with a Spring configuration class being used to pull properties from application.properties
* Refactored several DAOs that were calling InformaticaServiceClient so that they were being called in the service layer (and also fixed circular references)
* Started consolidating constants.properties into application.properties (will later have multiple profiles)
* Fixed several other Spring Bean declarations
