Add default value for test param wparam

In this commit, value for $wparam is added by trying which of our chosen
module is not in use.

Signed-off-by: Ziqian SUN (Zamir) <zsun@redhat.com>

tests/sanity/runtest.sh

@@ -114,6 +114,15 @@ rlJournalStart
         RunKmod $TESTS
     rlPhaseEnd
 
+    if ! (lsmod | grep gre)
+    then
+        wparam="gre"
+    elif ! (lsmod | grep uwb)
+    then
+        wparam="uwb"
+    else
+        wparam="atm"
+    fi
     rlPhaseStartTest "Modprobe with wrong parameter"
         rlRun -l "modprobe $wparam BADPARAM=this_should_fail" 0-1
         rlRun -l "dmesg | grep -i 'Unknown parameter' | grep 'BADPARAM' | grep '$wparam'"