Fix pinkie-promise missing npm dependency

20:09:52      [exec] npm ERR! fetch failed https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.0.tgz
20:09:52      [exec] npm WARN retry will retry, error on last attempt: Error: fetch failed with status code 404
20:10:04      [exec] npm ERR! fetch failed https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.0.tgz
20:10:04      [exec] npm WARN retry will retry, error on last attempt: Error: fetch failed with status code 404
20:11:06      [exec] npm ERR! fetch failed https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.0.tgz
20:11:06      [exec] npm ERR! Linux 4.4.0-98-generic
20:11:06      [exec] npm ERR! argv "/opt/build/tools/node-v6.9.2-linux-x64/bin/node" "/usr/bin/npm" "install"
20:11:06      [exec] npm ERR! node v6.9.2
20:11:06      [exec] npm ERR! npm  v4.0.5
20:11:06      [exec] 
20:11:06      [exec] npm ERR! fetch failed with status code 404
20:11:06      [exec] npm ERR! 
20:11:06      [exec] npm ERR! If you need help, you may report this error at:
20:11:06      [exec] npm ERR!     <https://github.com/npm/npm/issues>
20:11:06      [exec] 
20:11:06      [exec] npm ERR! Please include the following file with any support request:
20:11:06      [exec] npm ERR!     /opt/jenkins/workspace/TestAndPush/ondemand-testandpush-fguillaume-2/nuxeo-features/nuxeo-admin-center/nuxeo-admin-center-analytics/npm-debug.log