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: Id20fef954fd977a307ba36dce5c8c7365aa96a6d
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/systest/os_install_boot_stress.robot b/systest/os_install_boot_stress.robot
index cee9510..e3c1f08 100644
--- a/systest/os_install_boot_stress.robot
+++ b/systest/os_install_boot_stress.robot
@@ -13,7 +13,7 @@
 #   FTP_PASSWORD                The FTP password.
 #   OS_REPO_URL                 The URL for the OS to be installed.
 #                               (e.g "ftp.com/redhat/RHEL/Server/os/").
-#   Optional Paramters:
+#   Optional Parameters:
 #     HTX_DURATION              The duration of the HTX run (e.g 2h,3m)
 #                               Defaults to 2h.
 #     HTX_INTERVAL              The time delay between checks of HTX
@@ -75,4 +75,4 @@
     ...  Run MDT Profile
     ...  AND  Repeat Keyword  ${HTX_DURATION}
     ...  Check HTX Run Status  ${HTX_INTERVAL}
-    ...  AND  Shutdown HTX Exerciser
\ No newline at end of file
+    ...  AND  Shutdown HTX Exerciser