Replace X.has_key('y') with x in y

Make it python3 compatible.

Author: rouilj

website/issues/html/_generic.help-submit.html

@@ -3,7 +3,7 @@
       <link rel="stylesheet" type="text/css" href="@@file/style.css" />
       <meta http-equiv="Content-Type"
        tal:attributes="content string:text/html;; charset=${request/client/charset}" />
-      <tal:block tal:condition="python:request.form.has_key('property')">
+      <tal:block tal:condition="python:'property' in request.form">
       <title>Generic submit page for framed helper windows</title>
       <script language="Javascript" type="text/javascript"
           tal:content="structure string:<!--

website/issues/html/_generic.help.html

@@ -4,7 +4,7 @@
       <link rel="stylesheet" type="text/css" href="@@file/style.css" />
       <meta http-equiv="Content-Type"
        tal:attributes="content string:text/html;; charset=${request/client/charset}" />
-      <tal:block tal:condition="python:request.form.has_key('property')">
+      <tal:block tal:condition="python:'property' in request.form">
       <tal:block tal:define="property request/form/property/value">
       <title i18n:translate=""><tal:x i18n:name="property"
        tal:content="property" i18n:translate="" /> help - <span i18n:name="tracker"
@@ -27,7 +27,7 @@ <h1 id="logoheader">
 <div id="content-body">
 <div id="content">
 <div id="breadcrumb">Python Issue Tracker: Help - <tal:block tal:content="context/classname">item</tal:block></div>
-<tal:block tal:condition="python:request.form.has_key('property')">
+<tal:block tal:condition="python:'property' in request.form">
  <form name="frm_help" action="#"
        tal:define="batch request/batch;
                    props python:request.form['properties'].value.split(',')">
@@ -104,7 +104,7 @@ <h1 id="logoheader">
 
  </form>
  </tal:block>
- <tal:block tal:condition="python:not request.form.has_key('property')">
+ <tal:block tal:condition="python:'property' not in request.form">
  <tal:block tal:define="batch request/batch;
                         props python:request.form['properties'].value.split(',')">
      <table width="100%">

website/issues/html/file.item.html

@@ -39,7 +39,7 @@
    <input type="hidden" name="@template" value="item">
    <input type="hidden" name="@required" value="name,type">
    <input type="hidden" name="@multilink"
-          tal:condition="python:request.form.has_key('@multilink')"
+          tal:condition="python:'@multilink' in request.form"
           tal:attributes="value request/form/@multilink/value">
   </td>
   <td tal:content="structure context/submit">submit button here</td>

website/issues/html/user.forgotten.html

@@ -5,7 +5,8 @@
  i18n:translate="">Password reset request</span>
 <td class="content" metal:fill-slot="content">
 
-<tal:askforinfo tal:condition="python:options['error_message'] or not request.form.has_key('@action')"> 
+<tal:askforinfo tal:condition="python:options['error_message'] or
+			       '@action' not in request.form"> 
 
 <p i18n:translate="">You have two options if you have forgotten your password.
 If you know the email address you registered with, enter it below.</p>

website/issues/html/user.help.html

@@ -8,7 +8,7 @@
       <link rel="stylesheet" type="text/css" href="@@file/style.css" />
       <meta http-equiv="Content-Type"
        tal:attributes="content string:text/html;; charset=${request/client/charset}" />
-      <tal:block tal:condition="python:request.form.has_key('property')">
+      <tal:block tal:condition="python:'property' in request.form">
       <title><tal:x i18n:translate=""><tal:x i18n:name="property"
        tal:content="property" i18n:translate="" /> help - <span i18n:name="tracker"
 	       tal:replace="config/TRACKER_NAME" /></tal:x></title>