Fix server startup detection in tests

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Fix server startup detection

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Fix #352

You watch mode period can be configured using `-Dwatch.period=x`, where x is the polling period in seconds.

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>