Move hook-{name}-rtfd to proposal node

Our RTFD hook just does a curl request to upstream. As such, it is
very expensive to nodepool to build a node for the purpose of just
using curl.

Lets move the job to use the proposal node which is long living.

Change-Id: I8f407fdaeb890a4ae6a9b99caefe836b8f2f7819
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

jenkins/jobs/hooks.yaml

@@ -1,6 +1,6 @@
 - job-template:
     name: 'hook-{name}-rtfd'
-    node: 'bare-precise || bare-trusty'
+    node: 'proposal'
 
     builders:
       - revoke-sudo

zuul/openstack_functions.py

@@ -94,6 +94,7 @@ def set_node_options(item, job, params, default):
     params['OFFLINE_NODE_WHEN_COMPLETE'] = '1'
     proposal_re = r'^.*(merge-release-tags|(propose|upstream)-(.*?)-(constraints-.*|updates?))$'  # noqa
     release_re = r'^.*-(forge|jenkinsci|mavencentral|pypi-(both|wheel))-upload$'
+    hook_re = r'^hook-(.*?)-(rtfd)$'
     python26_re = r'^.*-(py(thon)?)?26.*$'
     centos6_re = r'^.*-centos6.*$'
     f21_re = r'^.*-f21.*$'
@@ -102,7 +103,8 @@ def set_node_options(item, job, params, default):
     puppetunit_re = (
         r'^gate-(puppet-.*|system-config)-puppet-(lint|syntax|unit).*$')
     # jobs run on the proposal worker
-    if re.match(proposal_re, job.name) or re.match(release_re, job.name):
+    if (re.match(proposal_re, job.name) or re.match(release_re, job.name) or
+            re.match(hook_re, job.name)):
         reusable_node(item, job, params)
     # Jobs needing python26
     elif re.match(python26_re, job.name):