add back deprecated rule api

Author: eyuan-netflix

nebula-archrules-gradle-plugin/src/main/kotlin/com/netflix/nebula/archrules/gradle/ArchrulesExtension.kt

@@ -50,6 +50,16 @@ abstract class ArchrulesExtension {
         consoleDetailsThreshold.set(Priority.valueOf(priority))
     }
 
+    @Deprecated("use ruleName instead")
+    fun rule(ruleName: String, action: Action<RuleConfig>) {
+        val config = RuleConfig()
+        action.execute(config)
+
+        config.priority?.let { priority ->
+            priorityOverridesByRuleName.put(ruleName, priority)
+        }
+    }
+
     fun ruleName(ruleName: String, action: Action<RuleConfig>) {
         val config = RuleConfig()
         action.execute(config)

nebula-archrules-gradle-plugin/src/test/kotlin/com/netflix/nebula/archrules/gradle/ArchrulesRunnerPluginTest.kt

@@ -476,7 +476,7 @@ archRules {
         priority("HIGH")
     }
     ruleName("deprecated") {
-        priority("LOW")
+        priority("MEDIUM")
     }
 }
 """
@@ -502,7 +502,7 @@ archRules {
         val deprecatedResults = results.filter { it.rule.ruleName.equals("deprecated") }
         assertThat(deprecatedResults).hasSize(2)
         deprecatedResults.forEach { result ->
-            assertThat(result.rule.priority).isEqualTo(Priority.LOW)
+            assertThat(result.rule.priority).isEqualTo(Priority.MEDIUM)
         }
     }