Change initial timeout value from 0 to 1

Way to go. I actually initialized the timeout value to 0. If the server
blocks a harvest attempt due to preventing overloading or DoS attacks it
will not sleep at all, due passing 0 to the sleep method. In fact, due
to multiplying 0 with 2 the timeout was not increased, too.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>