Removed all tabs and trailing spaces from /tests

This commit is style changes only.
It removes trailing spaces and tabs from all files in /tests

Change-Id: Iae779c82b20d1cde264e64aeb4943585ce7426f5
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/tests/test_sensors.robot b/tests/test_sensors.robot
index 36095c3..79ce8c2 100644
--- a/tests/test_sensors.robot
+++ b/tests/test_sensors.robot
@@ -304,7 +304,7 @@
 Response Should Be Empty
     Should Be Empty    ${OUTPUT}
 
-Read the Attribute     
+Read the Attribute
     [arguments]    ${uri}    ${parm}
     ${output} =     Read Attribute      ${uri}    ${parm}
     set test variable    ${OUTPUT}     ${output}