Lowering periodic and too high log for mastership

Change-Id: Ic8c6f418f4707f60194dd5a623c329e010292c06
diff --git a/app/src/main/java/org/opencord/olt/impl/Olt.java b/app/src/main/java/org/opencord/olt/impl/Olt.java
index 3e2aa83..2886025 100644
--- a/app/src/main/java/org/opencord/olt/impl/Olt.java
+++ b/app/src/main/java/org/opencord/olt/impl/Olt.java
@@ -974,7 +974,7 @@
                     flowRuleService.purgeFlowRules(devId);
                     return;
                 } else if (!isLocalLeader) {
-                    log.info("not handling event because of not local leader for {}", devId);
+                    log.debug("Not handling event because instance is not leader for {}", devId);
                     return;
                 }