code: public Issue createIssue(String projectKey, Issue issue) throws RedmineException {
  		final Project oldProject = issue.getProject();
  		final Project newProject = new Project();
  		newProject.setIdentifier(projectKey);
  		issue.setProject(newProject);
  		try {
  			return transport.addObject(issue, new BasicNameValuePair("include",
  					INCLUDE.attachments.toString()));
  		} finally {
  			issue.setProject(oldProject);
  		}
      }
docs: Sample usage:
  <p/>
  <p/>
  <pre>
  {@code
  Issue issueToCreate = new Issue();
  issueToCreate.setSubject("This is the summary line 123");
  Issue newIssue = mgr.createIssue(PROJECT_KEY, issueToCreate);
  }
  
  @param projectKey The project "identifier". This is a string key like "project-ABC", NOT a database numeric ID.
  @param issue      the Issue object to create on the server.
  @return the newly created Issue.
  @throws RedmineAuthenticationException invalid or no API access key is used with the server, which
  requires authorization. Check the constructor arguments.
  @throws NotFoundException       the project with the given projectKey is not found
  @throws RedmineException