Test documentation typo fixes using codespell tool

Changes:
      - Fix typo in code documentation and test name

Tested: - Using codespell tool.

Change-Id: Ia1b65bddc01a4b1c103af9f2094d87da11c88953
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/rest_client.robot b/lib/rest_client.robot
index d5462fd..c82087f 100644
--- a/lib/rest_client.robot
+++ b/lib/rest_client.robot
@@ -210,7 +210,7 @@
     ...  X-Auth-Token=${XAUTH_TOKEN}
     ${data}=  Create dictionary  data=@{EMPTY}
 
-    # If there is no active sesion it will throw the following exception
+    # If there is no active session it will throw the following exception
     # "Non-existing index or alias 'openbmc'"
     ${resp}=  POST On Session  openbmc
     ...  /logout  json=${data}  headers=${headers}