jenkinsfile - watch screen test 4 remove log

api/Jenkinsfile.ble_test

@@ -91,6 +91,7 @@ pipeline {
                      if screen -list | grep -q ${env.TEST_HASH}; then
                          screen -S ble_test_${env.TEST_HASH} -X quit
                      fi
+                     rm /tmp/ble_test_${env.TEST_HASH}.log
                  """
              }
          }