allow interceptors to be registered via properties

src/test/java/ca/uhn/fhir/jpa/starter/CustomBeanTest.java

@@ -0,0 +1,24 @@
+package ca.uhn.fhir.jpa.starter;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = Application.class, properties = {
+		"hapi.fhir.custom-bean-packages=some.custom.pkg1,some.custom.pkg2",
+		"spring.datasource.url=jdbc:h2:mem:dbr4",
+		// "hapi.fhir.enable_repository_validating_interceptor=true",
+		"hapi.fhir.fhir_version=r4"
+})
+public class CustomBeanTest {
+
+	@Autowired
+	some.custom.pkg1.CustomBean customBean1;
+
+	@Test
+	void testCustomBeanExists() {
+		Assertions.assertNotNull(customBean1);
+		Assertions.assertEquals("I am alive", customBean1.getInitFlag());
+	}
+}