Delete job fix and wrong credentials exception handler fix

Delete job is enabled for Configuring state (before job submission to queue).
Fix for unhandled exception during login with the wrong username.

BusinessLogicTier/Logic/JobManagement/JobManagementLogic.cs

@@ -90,7 +90,7 @@ namespace HaaSMiddleware.BusinessLogicTier.Logic.JobManagement {
         {
             log.Info("User " + loggedUser.GetLogIdentification() + " is deleting the job with info Id " + submittedJobInfoId);
             SubmittedJobInfo jobInfo = GetSubmittedJobInfoById(submittedJobInfoId, loggedUser);
-            if (jobInfo.State >= JobState.Finished)
+            if (jobInfo.State == JobState.Configuring || jobInfo.State >= JobState.Finished)
             {
                 #warning Renci SSH.NET bug - resolving paths when deleting symlink, use ssh delete instead
                 //FileSystemFactory.GetInstance(jobInfo.NodeType.FileTransferMethod.Protocol)

BusinessLogicTier/Logic/UserAndLimitationManagement/UserAndLimitationManagementLogic.cs

@@ -44,7 +44,11 @@ namespace HaaSMiddleware.BusinessLogicTier.Logic.UserAndLimitationManagement {
 			
 			// Get user 
 			AdaptorUser user = unitOfWork.AdaptorUserRepository.GetByName(credentials.Username);
-			if ( user.Deleted ) {
+            if (user == null) {
+                log.Error("Authentication of user " + credentials.Username + " was not successful due to wrong credentials.");
+                throw new InvalidAuthenticationCredentialsException("Authentication of user " + credentials.Username + " was not successful due to wrong credentials.");
+            }
+            if ( user.Deleted ) {
 				log.Error("User " + user.Username + " that requested authentication was already deleted from the system.");
 				throw new AuthenticatedUserAlreadyDeletedException("User " + user.Username + " that requested authentication was already deleted from the system.");
 			}