Added an optional tracker_id field

Defining a tracker_id, will make sure that
the ticket will be created with the right "type".

If it is not filled, then it fallbacks to default
which is the first type available to the project
in the priority list.

lib/errbit_redmine_plugin/issue_tracker.rb

@@ -27,6 +27,11 @@ class IssueTracker < ErrbitPlugin::IssueTracker
         :optional    => true,
         :label       => "App Project",
         :placeholder => "Where app's files & revisions can be viewed. (Leave blank to use the above project by default)"
+      }],
+      [:tracker_id, {
+        :optional    => true,
+        :label       => "Issue Tracker Id",
+        :placeholder => "The tracker where tickets will be created. (Leave blank to use default)"
       }]
     ]
 
@@ -82,6 +87,7 @@ def create_issue(problem, reported_by = nil)
       user   = params['username']
       passwd = params['password']
       project_id = params['project_id']
+      tracker_id = params['tracker_id']
 
       RedmineClient::Base.configure do
         self.token = token
@@ -94,6 +100,7 @@ def create_issue(problem, reported_by = nil)
       issue = RedmineClient::Issue.new(:project_id => project_id)
       issue.subject = "[#{ problem.environment }][#{ problem.where }] #{problem.message.to_s.truncate(100)}"
       issue.description = self.class.body_template.result(binding)
+      issue.tracker_id = tracker_id if tracker_id.present?
       issue.save!
 
       problem.update_attributes(