Refactor to remove dependency on the HAPI FHIR Storage artifact

[ndegwamartin]

As part of the AuditEvent logging feature - we added the hapi-fhir-storage artifact to the repo so that we could reuse various constants and enums, mainly:

• ca.uhn.fhir.storage.interceptor.balp.BalpConstants;
• ca.uhn.fhir.storage.interceptor.balp.BalpProfileEnum;

    <!-- Needed to re-use Audit components -->
    <dependency>
      <groupId>ca.uhn.hapi.fhir</groupId>
      <artifactId>hapi-fhir-storage</artifactId>
      <version>8.0.0</version>
    </dependency>