fixed sonar issue in ArchiveInfraRequestsScheduler

fixed sonar issue as detailed in SO-963

Issue-ID: SO-963
Change-Id: Id5625663fdb531c1a2136bc17b1238ae79ba8eed
Signed-off-by: Sandeep J <sandeejh@in.ibm.com>
diff --git a/adapters/mso-requests-db-adapter/src/main/java/org/onap/so/adapters/requestsdb/ArchiveInfraRequestsScheduler.java b/adapters/mso-requests-db-adapter/src/main/java/org/onap/so/adapters/requestsdb/ArchiveInfraRequestsScheduler.java
index 9a7382f..28c56b3 100644
--- a/adapters/mso-requests-db-adapter/src/main/java/org/onap/so/adapters/requestsdb/ArchiveInfraRequestsScheduler.java
+++ b/adapters/mso-requests-db-adapter/src/main/java/org/onap/so/adapters/requestsdb/ArchiveInfraRequestsScheduler.java
@@ -4,6 +4,8 @@
  * ================================================================================
  * Copyright (C) 2017 - 2018 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
+ * Modifications Copyright (C) 2018 IBM.
+ * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -76,14 +78,14 @@
 			requestsByEndTime = infraActiveRepo.findByEndTimeLessThan(archivingDate, pageRequest);
 			logger.debug(requestsByEndTime.size() + " requests to be archived based on End Time" );
 			archiveInfraRequests(requestsByEndTime);
-		} while(requestsByEndTime.size() > 0);
+		} while(!requestsByEndTime.isEmpty());
 		
 		List<InfraActiveRequests> requestsByStartTime = new ArrayList<>();
 		do {
 			requestsByStartTime = infraActiveRepo.findByStartTimeLessThanAndEndTime(archivingDate, null, pageRequest);
 			logger.debug(requestsByEndTime.size() + " requests to be archived based on Start Time" );
 			archiveInfraRequests(requestsByStartTime);
-		} while(requestsByStartTime.size() > 0);
+		} while(!requestsByStartTime.isEmpty());
 		
 		logger.debug("End of archiveInfraRequestsScheduler");
 	}