jenkinsfile - put watchdog loop in another loop

api/Jenkinsfile.ble_test

@@ -87,11 +87,13 @@ pipeline {
                                 while ! pgrep -f "tail.*ble_test_${env.TEST_HASH}" > /dev/null; do
                                     sleep 1
                                 done
-                                while pgrep -f "tail.*ble_test_${env.TEST_HASH}" > /dev/null; do
-                                    if ! screen -list | grep -q ble_test_${env.TEST_HASH}; then
-                                        pkill -9 -f "tail.*ble_test_${env.TEST_HASH}"
-                                    fi
-                                    sleep 5
+                                while true; do
+                                    while pgrep -f "tail.*ble_test_${env.TEST_HASH}" > /dev/null; do
+                                        if ! screen -list | grep -q ble_test_${env.TEST_HASH}; then
+                                            pkill -9 -f "tail.*ble_test_${env.TEST_HASH}"
+                                        fi
+                                        sleep 5
+                                    done
                                 done
                                 exit
                             '