More double slash URL fixes

Fix SNMP test case library module.
Fix TCs that reference NETWORK_MANAGER.
Fix TCs that reference BMC_LOGGING_ENTRY.

Change-Id: I17070540062461ef2106e8e2aa7f43f835bf7fdd
Signed-off-by: Steven Sombar <ssombar@us.ibm.com>
diff --git a/lib/logging_utils.robot b/lib/logging_utils.robot
index 446bdd6..b13057c 100644
--- a/lib/logging_utils.robot
+++ b/lib/logging_utils.robot
@@ -162,7 +162,7 @@
 Delete Error Logs And Verify
     [Documentation]  Delete all error logs and verify.
     Delete All Error Logs
-    ${resp}=  OpenBMC Get Request  ${BMC_LOGGING_ENTRY}/list  quiet=${1}
+    ${resp}=  OpenBMC Get Request  ${BMC_LOGGING_ENTRY}list  quiet=${1}
     Should Be Equal As Strings  ${resp.status_code}  ${HTTP_NOT_FOUND}
     ...  msg=Error logs not deleted as expected.