Let epicsExitTest work on systems with strict priority scheduling.

src/libCom/test/epicsExitTest.c

@@ -64,4 +64,5 @@ void epicsExitTest(void)
     epicsThreadCreate("threadA",50,stackSize,thread,pinfoA);
     pinfoB = (info *)calloc(1,sizeof(info));
     epicsThreadCreate("threadB",50,stackSize,thread,pinfoB);
+    epicsThreadSleep(1.0);
 }

src/libCom/test/rtemsTestHarness.c

@@ -70,6 +70,7 @@ struct rtems_bsdnet_config rtems_bsdnet_config = {
 
 #include <stdio.h>
 #include <rtems/error.h>
+#include <epicsExit.h>
 
 rtems_task
 Init (rtems_task_argument ignored)
@@ -104,5 +105,4 @@ Init (rtems_task_argument ignored)
      */
     epicsRunLibComTests();
     epicsExit(0);
-    exit(0);
 }