fix https://github.com/alibaba/p3c/issues/185

idea-plugin/p3c-common/src/main/kotlin/com/alibaba/p3c/idea/inspection/AliPmdInspectionInvoker.kt

@@ -55,7 +55,7 @@ class AliPmdInspectionInvoker(
         val processor = AliPmdProcessor(rule)
         val start = System.currentTimeMillis()
         violations = processor.processFile(psiFile)
-        logger.info("elapsed ${System.currentTimeMillis() - start}ms to" +
+        logger.debug("elapsed ${System.currentTimeMillis() - start}ms to" +
                 " to apply rule ${rule.name} for file ${psiFile.virtualFile.canonicalPath}")
     }