Bug 1130392 - Sigar cannot detect kernel thread names

Sigar does detect the name of kernel threads, it's RHQ that has been filtering
them out.

The fix is simply removing the check for filename existence, and kernel thread
names don't have files anyway.

modules/core/native-system/src/main/java/org/rhq/core/system/ProcessInfo.java

@@ -40,6 +40,7 @@
 import org.hyperic.sigar.ProcExe;
 import org.hyperic.sigar.ProcFd;
 import org.hyperic.sigar.ProcMem;
+import org.hyperic.sigar.ProcStat;
 import org.hyperic.sigar.ProcState;
 import org.hyperic.sigar.ProcTime;
 import org.hyperic.sigar.Sigar;
@@ -518,9 +519,7 @@ private String determineName(String[] procArgs, ProcExe procExe, ProcState procS
         } else if ((procExe != null) && (procExe.getName() != null)) {
             name = procExe.getName();
         } else if ((procState != null) && (procState.getName() != null)) {
-            String stateName = procState.getName();
-            name = ((stateName.indexOf(File.separatorChar) >= 0) && (new File(stateName).exists())) ? stateName
-                : UNKNOWN_PROCESS_NAME;
+            name = procState.getName();
         } else {
             name = UNKNOWN_PROCESS_NAME;
         }