Property timeout causes a class cast exception if is set

[alvesedgar]

If the timeout property is available to override the 30s for waiting for the deploy to be done, i tracked down to the task DeployTask on line

ci.gradle/src/main/groovy/io/openliberty/tools/gradle/tasks/DeployTask.groovy

Line 646 in 0b72dc4

appTimeout = server.timeout * 1000

, the property is defined as String but it's used as long, should this property used on liberty start as well why exist two properties to do the same thing timeout and verifyAppStartTimeout

[mattbsox]

The two timeout variables have slightly different use cases. We'll look into simplifying/clarifying those in the future. For now I've added a fix for the casting issue that keeps the plugin behavior the same.