add npm lint task to gradle
add npm lint task to gradle

abesto/zipkin,adriancole/zipkin,adriancole/zipkin,abesto/zipkin,openzipkin/zipkin,openzipkin/zipkin,abesto/zipkin,twitter/zipkin,adriancole/zipkin,abesto/zipkin,openzipkin/zipkin,twitter/zipkin,openzipkin/zipkin,openzipkin/zipkin,adriancole/zipkin,twitter/zipkin,twitter/zipkin