Update lockedEther testcase

scripts/travis_test.sh

@@ -7,8 +7,9 @@ if [ $? -ne 1 ]; then
     exit 1
 fi
 
+# contains also the test for the suicidal detector
 slither tests/backdoor.sol --disable-solc-warnings
-if [ $? -ne 1 ]; then
+if [ $? -ne 2 ]; then
     exit 1
 fi
 

tests/locked_ether.sol

@@ -22,3 +22,5 @@ contract Unlocked is Locked, Send{
     }
 
 }
+
+contract OnlyLocked is Locked{ }