monitoring: add to google-cloud

[stephenplusplus]

No description provided.

[stephenplusplus]

@landrito @jmuk we're getting an error trying to use the generated API:

https://github.com/GoogleCloudPlatform/google-cloud-node/blob/97207ec97bea51bfc9049c6a818a6ee7338bdadf/packages/monitoring/src/v3/group_service_api.js#L524

var groupServiceClient = require('grpc-google-monitoring-v3').client;

grpc-google-monitoring-v3 doesn't exist on npm and isn't a dependency. Is this a typo?

[coveralls]

Coverage remained the same at 100.0% when pulling 7d6d122 on stephenplusplus:spp--monitoring-hello into 4a4493a on GoogleCloudPlatform:master.

[landrito]

I suspect that I generated the file with an incorrect package name which caused this error because the gapic-yaml package name is not here. I'll regenerate. Sec

[landrito]

I regenerated at #1741.

[coveralls]

Coverage remained the same at 100.0% when pulling 58e7806 on stephenplusplus:spp--monitoring-hello into f8f713a on GoogleCloudPlatform:master.