Fix "pause_teardown" help text for docutils

This patch removes the space in front of two lines in the help text of
the "pause_teardown" configuration option to resolve issues with modern
versions of docutils which will raise ERROR: Unexpected indentation. [docutils]

Closes-Bug: 2086747
Change-Id: Ib295ea1c6ff521d880180143a8ed40fbc73168c9
diff --git a/tempest/config.py b/tempest/config.py
index e7442ea..36f0152 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -1354,9 +1354,9 @@
 
 The best use case is investigating used resources of one test.
 A test can be run as follows:
- $ stestr run --pdb TEST_ID
+$ stestr run --pdb TEST_ID
 or
- $ python -m testtools.run TEST_ID"""),
+$ python -m testtools.run TEST_ID"""),
     cfg.StrOpt('resource_name_prefix',
                default='tempest',
                help="Define the prefix name for the resources created by "