Update API's to accept type hints for external

Signed-off-by: Gary O'Neall <gary@sourceauditor.com>

Author: goneall

src/test/java/org/spdx/library/model/compat/v2/SpdxModelInfoV2_XTest.java

@@ -70,12 +70,12 @@ public void tearDown() throws Exception {
 	public void testCreateExternalElement() throws InvalidSPDXAnalysisException {
 		// external license
 		String licenseUri = "http://prefix#" + SpdxConstantsCompatV2.NON_STD_LICENSE_ID_PRENUM + "test";
-		CoreModelObject external = modelInfo.createExternalElement(modelStore, licenseUri, copyManager, Version.TWO_POINT_THREE_VERSION);
+		CoreModelObject external = modelInfo.createExternalElement(modelStore, licenseUri, copyManager, null, Version.TWO_POINT_THREE_VERSION);
 		assertTrue(external instanceof ExternalExtractedLicenseInfo);
 		assertEquals(licenseUri, external.getObjectUri());
 		// external license
 		String elementUri = "http://prefix#" + SpdxConstantsCompatV2.SPDX_ELEMENT_REF_PRENUM + "test";
-		external = modelInfo.createExternalElement(modelStore, elementUri, copyManager, Version.TWO_POINT_THREE_VERSION);
+		external = modelInfo.createExternalElement(modelStore, elementUri, copyManager, null, Version.TWO_POINT_THREE_VERSION);
 		assertTrue(external instanceof ExternalSpdxElement);
 		assertEquals(elementUri, external.getObjectUri());
 	}