Fixed some Crossorigin issues in some environment setup.

Author: tobiasake

src/main/java/com/ericsson/ei/frontend/BackEndInformationController.java

@@ -25,6 +25,7 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 
@@ -38,13 +39,15 @@ public class BackEndInformationController {
     @Autowired
     private BackEndInfoirmationControllerUtils backEndInfoContUtils;
 
+    @CrossOrigin
     @RequestMapping(value = "/backend", method = RequestMethod.GET)
     public ResponseEntity<String> getInstances(Model model, HttpServletRequest request) {
         LOG.debug("Recieved request for instances.");
         ResponseEntity<String> response = backEndInfoContUtils.handleRequestForInstances(request);
         return response;
     }
 
+    @CrossOrigin
     @RequestMapping(value = "/backend", method = RequestMethod.PUT)
     public ResponseEntity<String> switchBackEndInstance(Model model, HttpServletRequest request) {
         LOG.debug("Recieved request to switch back end.");
@@ -53,13 +56,15 @@ public ResponseEntity<String> switchBackEndInstance(Model model, HttpServletRequ
 
     }
 
+    @CrossOrigin
     @RequestMapping(value = "/backend", method = RequestMethod.DELETE)
     public ResponseEntity<String> deleteBackEndInstance(Model model, HttpServletRequest request) {
         LOG.debug("Recieved request to delete back end.");
         ResponseEntity<String> response  = backEndInfoContUtils.handleRequestToDeleteBackEnd(request);
         return response;
     }
 
+    @CrossOrigin
     @RequestMapping(value = "/backend", method = RequestMethod.POST)
     public ResponseEntity<String> addInstanceInformation(Model model, HttpServletRequest request) {
         LOG.debug("Recieved request to add back end.");