Change default configuration to not use throttling semaphore

[jphickey]

Is your feature request related to a problem? Please describe.
The default/example table source files include a semaphore name - cf_1_sem and cf_2_sem - for throttling on channel 1 and 2, respectively.

However, CF does not actually create the throttling semaphores, it expects the semaphore to be created before CF starts. If a new user is starting CF by itself with no other support apps running, this semaphore will not exist.

Describe the solution you'd like
To make it simpler to build and run CF with a default configuration, the example table should have an empty string for the semaphore name - this means no throttle.

Additional context
This will make CF at least boot up and load "out of the box" ... but probably any real deployment will need a throttle, so this means that we don't have an example of a throttling semaphore anymore.

Requester Info
Joseph Hickey, Vantage Systems, Inc.