add missing testng.xml for helix-agent
add missing testng.xml for helix-agent

dasahcc/helix,lei-xia/helix,jzmq/helix,Teino1978-Corp/Teino1978-Corp-helix,kongweihan/helix,jzmq/helix,dasahcc/helix,brandtg/helix,brandtg/helix,lei-xia/helix,AyolaJayamaha/helix,fx19880617/helix,AyolaJayamaha/helix,dasahcc/helix,hdatas/helix,apache/helix,OopsOutOfMemory/helix,OopsOutOfMemory/helix,apache/helix,dasahcc/helix,Teino1978-Corp/Teino1978-Corp-helix,kongweihan/helix,fx19880617/helix,OopsOutOfMemory/helix,dasahcc/helix,fx19880617/helix,lei-xia/helix,lei-xia/helix,kongweihan/helix,apache/helix,Teino1978-Corp/Teino1978-Corp-helix,brandtg/helix,hdatas/helix,AyolaJayamaha/helix,apache/helix,jzmq/helix,jzmq/helix,brandtg/helix,dasahcc/helix,apache/helix,lei-xia/helix,OopsOutOfMemory/helix,Teino1978-Corp/Teino1978-Corp-helix,lei-xia/helix,apache/helix,hdatas/helix,AyolaJayamaha/helix,fx19880617/helix