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: I75e60b1ccb683cb34118bfffc327ec7fc8573e06
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/scripts/dbus-unit-test.py b/scripts/dbus-unit-test.py
index a6ccb72..0bb66a7 100755
--- a/scripts/dbus-unit-test.py
+++ b/scripts/dbus-unit-test.py
@@ -3,7 +3,7 @@
 """
 This script launches a dbus session, sets the DBUS_SESSION_BUS_ADDRESS
 and DBUS_STARTER_BUS_TYPE Eenvironment variables and puts the generated files
-in the dbus dir location passed as a paramter. It then runs the unit test
+in the dbus dir location passed as a parameter. It then runs the unit test
 script, and then cleans up the generated dbus files.
 """