moved reusable parts of global.jelly to abstract instant-messaging pl…

…ugin

src/main/resources/hudson/plugins/im/IMPublisher/global-jenkinsLogin.jelly

@@ -0,0 +1,13 @@
+<?jelly escape-by-default='true'?>
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
+
+  <f:entry title="Jenkins Username" help="/plugin/instant-messaging/help-jenkins-login.html">
+    <f:textbox name="${descriptor.PARAMETERNAME_HUDSON_LOGIN}"
+      value="${descriptor.hudsonUserName}" />
+  </f:entry>
+  <f:entry title="Jenkins Password">
+    <f:password name="${descriptor.PARAMETERNAME_HUDSON_PASSWORD}"
+      value="${descriptor.hudsonPassword}" />
+  </f:entry>
+
+</j:jelly>

src/main/webapp/help-jenkins-login.html

@@ -0,0 +1,6 @@
+<div>
+    If you're using a secured Jenkins, you must specify a valid username and password for the IM bot.
+    Otherwise most commands won't work.<br />
+    You can also use this to restrict which commands can be executed via the bot, by removing the respective
+    permissions for this user.
+</div>