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/utils.robot b/lib/utils.robot
index 51a6d03..29afce2 100755
--- a/lib/utils.robot
+++ b/lib/utils.robot
@@ -514,7 +514,7 @@
     [Documentation]  Delete error logs.
 
     # Check if error logs entries exist, if not return.
-    ${resp}=  OpenBMC Get Request  ${BMC_LOGGING_ENTRY}${/}list  quiet=${1}
+    ${resp}=  OpenBMC Get Request  ${BMC_LOGGING_ENTRY}list  quiet=${1}
     Return From Keyword If  ${resp.status_code} == ${HTTP_NOT_FOUND}
 
     # Get the list of error logs entries and delete them all.