puppetboard/app: Loading the environments in each error_processor function

In the previous commit the environment loading was moving to each request
and that functionality change was not reflected in the error processor
functions (for 4xx and 5xx series errors)

puppetboard/app.py

@@ -95,16 +95,19 @@ def utility_processor():
 
 @app.errorhandler(400)
 def bad_request(e):
+    envs = environments()
     return render_template('400.html', envs=envs), 400
 
 
 @app.errorhandler(403)
 def forbidden(e):
+    envs = environments()
     return render_template('403.html', envs=envs), 400
 
 
 @app.errorhandler(404)
 def not_found(e):
+    envs = environments()
     return render_template('404.html', envs=envs), 404
 
 
@@ -112,11 +115,13 @@ def not_found(e):
 def precond_failed(e):
     """We're slightly abusing 412 to handle missing features
     depending on the API version."""
+    envs = environments()
     return render_template('412.html', envs=envs), 412
 
 
 @app.errorhandler(500)
 def server_error(e):
+    envs = environments()
     return render_template('500.html', envs=envs), 500