Minor changes for cases with embedded resources

Author: oleksii-unnamed

Demos/demos-api-tests/src/test/java/com/groupdocs/ui/viewer/demosapitests/embedded/LoadEmbeddedDocumentDescriptionApiTests.java

@@ -62,7 +62,7 @@ public void testLoadDocumentDescription(String caseFile) throws IOException {
 
             actualObject = given()
                     .when()
-                    .body(String.format("{ 'guid': '%s', 'password': '%s' }".replace('\'', '"'), sourceGuid, sourcePassword))
+                    .body(String.format("{ 'guid': '%s', 'password': '%s' }".replace('\'', '"'), sourceGuid, sourcePassword).replace("\"null\"", "null"))
                     .contentType(ContentType.JSON)
                     .post(Constants.URL_TEMPLATE, "loadDocumentDescription")
                     .then()