Use java.lang.Runtime.Version to check the version of debugee.

Currently `checkVMVersion()` in `sun.jvm.hotspot.runtime.VM` has following code to check the version of debugee.

```
        if (saVersion.indexOf('-') == saVersion.lastIndexOf('-') &&
            vmVersion.indexOf('-') == vmVersion.lastIndexOf('-')) {
           // Throw exception if different release versions:
           // <major>.<minor>-b<n>
           throw new VMVersionMismatchException(saVersion, vmRelease);
        } else {
           // Otherwise print warning to allow mismatch not release versions
           // during development.
           System.err.println("WARNING: Hotspot VM version " + vmRelease +
                              " does not match with SA version " + saVersion +
                              "." + " You may see unexpected results. ");
        }
```

It seems to expect to allow the deference in option string only.
For example, saVersion is "17+35", and vmVersion is "17+35-2724", then it should be allowed because release version (17+35) is same. However current code would not do so.

I guess this code is not based on JEP 223 (New Version-String Scheme) because the comment says "<major>.<minor>-b<n>". Fortunately we have `Runtime.Version` to handle version strings. We should refactor with it.