Fix src_path referenced before assignment on shellshock

chaos_monkey/exploit/shellshock.py

@@ -99,7 +99,7 @@ class ShellShockExploiter(HostExploiter):
                 LOG.info("Host %s was already infected under the current configuration, done" % self.host)
                 return True  # return already infected
 
-            src_path = src_path or get_target_monkey(self.host)
+            src_path = get_target_monkey(self.host)
             if not src_path:
                 LOG.info("Can't find suitable monkey executable for host %r", self.host)
                 return False