Add some new thread metric and class metric to JVMMetric

[Switch-vov]

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• Feature or performance improvement

---

Requirement or improvement

Add some new thread metric and class metric to JVMMetric.

Protocal

message JVMMetric {
    int64 time = 1;
    CPU cpu = 2;
    repeated Memory memory = 3;
    repeated MemoryPool memoryPool = 4;
    repeated GC gc = 5;
    Thread thread = 6;
    Class clazz = 7;
}

message Thread {
    int64 liveCount = 1;
    int64 daemonCount = 2;
    int64 peakCount = 3;
    // new metric
    int64 newStateThreadCount = 4;
    int64 runnableStateThreadCount = 5;
    int64 blockedStateThreadCount = 6;
    int64 waitingStateThreadCount = 7;
    int64 timedWaitingStateThreadCount = 8;
    int64 terminatedStateThreadCount = 9;
}

// new metric
message Class {
    int64 loadedClassCount = 1;
    int64 totalUnloadedClassCount = 2;
    int64 totalLoadedClassCount = 3;
}

The result in skywalking ui

[wu-sheng]

You could send pull request to data-collect-protocol repo, we could check details there.

[Switch-vov]

You could send pull request to data-collect-protocol repo, we could check details there.

ok. I'm trying to send PR.