Refactors grid connections (#3219)

Extracted all checks and subsequent updates to a factory method from the constructor.
Reordered checks to check for nulls before anything else.
Also existing connections before security breaks.
Fixes TileController#checkController() using the wrong position.
Added debug logging for failed connections.
Improved logging.
Inversed boolean so false no longer means security check passed.
Only issue a security break on SecurityConnectionException.

src/main/java/appeng/me/cluster/implementations/QuantumCluster.java

@@ -38,6 +38,7 @@ import appeng.api.networking.IGridHost;
 import appeng.api.networking.IGridNode;
 import appeng.api.util.AEPartLocation;
 import appeng.api.util.WorldCoord;
+import appeng.core.AELog;
 import appeng.me.cache.helpers.ConnectionWrapper;
 import appeng.me.cluster.IAECluster;
 import appeng.tile.qnb.TileQuantumBridge;
@@ -161,6 +162,7 @@ public class QuantumCluster implements ILocatable, IAECluster
 				catch( final FailedConnectionException e )
 				{
 					// :(
+					AELog.debug( e );
 				}
 			}
 			else