Use dedicated exceptions to track incompatible/missing plugin

to be used by other component to log/resolve configuration issue.

core/src/main/java/hudson/PluginWrapper.java

@@ -501,10 +501,10 @@ public class PluginWrapper implements Comparable<PluginWrapper>, ModelObject {
         }
 
         if (!missingDependencies.isEmpty())
-            throw new IOException("Dependency "+Util.join(missingDependencies, ", ")+" doesn't exist");
+            throw new MissingDepencyException("Dependency "+Util.join(missingDependencies, ", ")+" doesn't exist", missingDependencies);
 
         if (!incompatibleDependencies.isEmpty())
-            throw new IOException("Dependency "+Util.join(incompatibleDependencies, ", ")+" doesn't match required version");
+            throw new IncompatibleDependencyException("Dependency "+Util.join(incompatibleDependencies, ", ")+" doesn't match required version", incompatibleDependencies);
 
     }
 
@@ -646,4 +646,21 @@ public class PluginWrapper implements Comparable<PluginWrapper>, ModelObject {
 
     private static final Logger LOGGER = Logger.getLogger(PluginWrapper.class.getName());
 
+    public class IncompatibleDependencyException extends IOException {
+        public final List<String> plugins;
+
+        public IncompatibleDependencyException(String message, List<String> plugins) {
+            super(message);
+            this.plugins = plugins;
+        }
+    }
+
+    public class MissingDepencyException extends IOException {
+        public final List<String> plugins;
+
+        public MissingDepencyException(String message, List<String> plugins) {
+            super(message);
+            this.plugins = plugins;
+        }
+    }
 }