Fix typo errors in devstack documentation
This submission fixes typo errors in following files
1. contributing.rst
2. exerciserc.rst
3. faq.rst
4. local.conf.rst
5. openrc.rst
Change-Id: I2b2d61673c3c95f60c56978b5a81016603fef252
diff --git a/doc/source/exerciserc.rst b/doc/source/exerciserc.rst
index f3780c3..dacae2e 100644
--- a/doc/source/exerciserc.rst
+++ b/doc/source/exerciserc.rst
@@ -3,7 +3,7 @@
==============================
``exerciserc`` is used to configure settings for the exercise scripts.
-The values shown below are the default values. Thse can all be
+The values shown below are the default values. These can all be
overridden by setting them in the ``localrc`` section.
ACTIVE\_TIMEOUT