Fix spelling mistakes

git ls-files | misspellings -f -
Source: https://github.com/lyda/misspell-check

Change-Id: I7d63578734ca5cc1ec865a7d024c1a013d1ada87
diff --git a/lib/tempest b/lib/tempest
index 277c68a..f3dcfbb 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -3,7 +3,7 @@
 
 # Dependencies:
 # ``functions`` file
-# ``lib/nova`` service is runing
+# ``lib/nova`` service is running
 # <list other global vars that are assumed to be defined>
 # - ``DEST``, ``FILES``
 # - ``ADMIN_PASSWORD``
@@ -78,7 +78,7 @@
     # sudo python setup.py deploy
 
     # This function exits on an error so that errors don't compound and you see
-    # only the first error that occured.
+    # only the first error that occurred.
     errexit=$(set +o | grep errexit)
     set -o errexit