Fix HTX library import

Changes:
    - Correct the python filename for the import
      for HTX

Tested:
   - NA

Change-Id: I6007aaa90529052d9e0ed3b60f205090ccb1851f
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/systest/htx_softbootme_test.robot b/systest/htx_softbootme_test.robot
index 3234758..a354057 100644
--- a/systest/htx_softbootme_test.robot
+++ b/systest/htx_softbootme_test.robot
@@ -15,7 +15,7 @@
 Resource        ../lib/os_utilities.robot
 Library         ../lib/os_utils_keywords.py
 Resource        ../lib/openbmc_ffdc_utils.robot
-Library         ../lib/os_utilities.robot
+Library         ../lib/os_utilities.py
 Library         DateTime
 
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