Add ability to register multiple checks per service

[vkostetski]

This feature has not benn published in docs yet, but this request works fine:
Req: http://.../v1/agent/service/register
Body:
{
"ID": "crab_net",
"Name": "crab_net",
"Tags": [
"master",
"v1",
"crab"
],
"Address": "...",
"Port": 22037,
"Checks": [{
"HTTP": "http://127.0.0.1:22037",
"Interval": "10s"
},
{
"HTTP": "http://127.0.0.1:22038",
"Interval": "30s"
}]
}

More info: hashicorp/consul#230

[rickfast]

We can support this. I will try and find time this week to investigate. Pull requests welcome!

[gjesse]

i'd be happy to take a crack at it, will have a bit of time this afternoon to check it out

[rickfast]

this feature is released in com.orbitz.consul:consul-client:0.9.10