Stop gating on sample generation check

This removes the check on in tree sample generation to ensure the file
matches the config options. However, to counter the loss of the in-tree
the tempest init command will now automatically generate a new sample
config in the local etc dir when run. This will include all of the oslo
options that were previously included in the in-tree sample file.
Additionally, the docs now contain the complete text of the generated
sample output. These also get published on docs.openstack.org on each
commit to tempest. Between this 2 alternatives there shouldn't be a need
to keep the file in tree anymore, especially given the weekly headaches
with new oslo releases changing the config option help breaking the job.

Change-Id: Ie3bc368329d240ca9604cc2f9b2cac544b3ee715
Depends-On: I4064a041a965ed2419b68efc8dc31fce37b24cfd
diff --git a/.gitignore b/.gitignore
index 043de00..f584532 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 ChangeLog
 *.pyc
 etc/tempest.conf
+etc/tempest.conf.sample
 etc/logging.conf
 include/swift_objects/swift_small
 include/swift_objects/swift_medium