Spelling fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: I13bbeeb8f1467efc1cf8748e1a66343e879dfc8a
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/tests/test_user.robot b/tests/test_user.robot
index 952c4b8..6da38ba 100755
--- a/tests/test_user.robot
+++ b/tests/test_user.robot
@@ -5,7 +5,7 @@
 ...                 instance per test case however we end up running multiple
 ...                 test and multiple iteration. This creates scenario where
 ...                 the same previous user is generated.
-...                 As a good pratice, clean up all the users at the end of
+...                 As a good practice, clean up all the users at the end of
 ...                 test.
 
 Resource            ../lib/rest_client.robot