Upgrade to ADCore R3-0

Fix the plugin constructor arguments to the super constructor by
removing numParams and adding maxThreads.  (These ADCore changes were
introduced in R3-0 in commit 3af87bd.)

Fix the super call in processCallbacks to call NDPluginDriver's
beginProcessCallbacks method since processCallbacks in NDPluginDriver
was renamed to beginProcessCallbacks.  (This ADCore change was
introduced in R3-0 in commit 3af87bd.)

Call start() in adPythonPluginConfigure.  (The start method was added in
ADCore in R2-5 in commit b1a2f13.)

adPythonApp/src/adPythonPlugin.cpp

@@ -47,11 +47,11 @@ adPythonPlugin::adPythonPlugin(const char *portNameArg, const char *filename,
                    const char *NDArrayPort, int NDArrayAddr, int maxBuffers, 
                    size_t maxMemory, int priority, int stackSize)
     : NDPluginDriver(portNameArg, queueSize, blockingCallbacks,
-                       NDArrayPort, NDArrayAddr, 1, NUM_ADPYTHONPLUGIN_PARAMS, 
+                       NDArrayPort, NDArrayAddr, 1,
                        maxBuffers, maxMemory,
                        asynGenericPointerMask|asynFloat64ArrayMask,
                        asynGenericPointerMask|asynFloat64ArrayMask,
-                       ASYN_MULTIDEVICE, 1, priority, stackSize) 
+                       ASYN_MULTIDEVICE, 1, priority, stackSize, 1)
 {
     // Initialise some params
     this->pInstance = NULL;
@@ -131,7 +131,7 @@ void adPythonPlugin::initThreads()
   */
 void adPythonPlugin::processCallbacks(NDArray *pArray) {
     // First call the base class method
-    NDPluginDriver::processCallbacks(pArray);
+    NDPluginDriver::beginProcessCallbacks(pArray);
 
     // Make sure we are in a good state, otherwise do nothing
     if (this->pluginState != GOOD) return;
@@ -848,6 +848,7 @@ static int adPythonPluginConfigure(const char *portNameArg, const char *filename
                    NDArrayPort, NDArrayAddr, maxBuffers, maxMemory,
                    priority, stackSize);
     adp->initThreads();
+    adp->start();
     return(asynSuccess);
 }