Implement hashCode and equals for Module

compiler/util/src/org/jetbrains/kotlin/modules/Module.kt

@@ -30,4 +30,15 @@ public interface Module {
     public fun getAnnotationsRoots(): List<String>
 
     public fun getJavaSourceRoots(): List<String>
+
+    override fun equals(other: Any?): Boolean =
+        when {
+            this === other -> true
+            other !is Module -> false
+            else -> getModuleName() == other.getModuleName() &&
+                    getModuleType() == other.getModuleType()
+        }
+
+    override fun hashCode(): Int =
+            31 * getModuleName().hashCode() + getModuleType().hashCode()
 }