Updated openstack/openstack
Project: openstack/nova  8df565d39cd3216bde8488e656957a49dd6949fa
null
Fix the section name in CONTRIBUTING.rst

The name of the section 'if you'are developer...' has changed
in the wiki. This commit updates it to correctly refer to
the good section.

Change-Id: I76767250b45e2550ac1601349a562a7641d41fc3