TimeUtil.sleepSeconds() added
Thread.sleep replaced with TimeUtil.sleepSeconds
TimeUnit.SECONDS.sleep replaced with TimeUtil.sleepSeconds
sleepSeconds(long) deleted
Merge remote-tracking branch 'upstream/master' into timeutil

Conflicts:
	merlin-core/src/main/java/org/apache/falcon/regression/core/util/AssertUtil.java
	merlin-core/src/main/java/org/apache/falcon/regression/core/util/InstanceUtil.java
	merlin/src/main/java/org/apache/falcon/regression/ui/pages/Page.java
	merlin/src/main/java/org/apache/falcon/regression/ui/pages/ProcessPage.java
	merlin/src/test/java/org/apache/falcon/regression/prism/NewPrismProcessUpdateTest.java
	merlin/src/test/java/org/apache/falcon/regression/prism/RetentionTest.java
	merlin/src/test/java/org/apache/falcon/regression/prism/UpdateAtSpecificTimeTest.java
Merge pull request #321 from rostafiychuk/timeutil

Thread.sleep replaced by TimeUtil method