Update arquillian bot integration tests - to resolve intermittent timing issue

Recent updates to tests have exposed another timing issue that had been masked - need to increase the timeout for Central to load as this is causing intermittent timeouts and test failures:

org.jboss.reddeer.common.exception.WaitTimeoutExpiredException: Timeout after: 10 s.: Waiting for Central to load
at org.jboss.reddeer.common.wait.AbstractWait.timeoutExceeded(AbstractWait.java:183)
at org.jboss.reddeer.common.wait.AbstractWait.wait(AbstractWait.java:136)
at org.jboss.reddeer.common.wait.AbstractWait.<init>(AbstractWait.java:101)
at org.jboss.reddeer.common.wait.AbstractWait.<init>(AbstractWait.java:71)
at org.jboss.reddeer.common.wait.AbstractWait.<init>(AbstractWait.java:56)
at org.jboss.reddeer.common.wait.AbstractWait.<init>(AbstractWait.java:44)
at org.jboss.reddeer.common.wait.WaitUntil.<init>(WaitUntil.java:35)
at org.jboss.tools.arquillian.ui.bot.test.cruiserView.BasicArquilliaCruiserTest.setup(BasicArquilliaCruiserTest.java:48)