Add import for publisher_rpc option

If this option is not imported a NoSuchOptError is
raised starting the ceilometer-collector service

Closes-Bug: #1258650
Change-Id: I46f8a0510603d31ce8cc9a0b5b15880083138487
fix unit

The unit in document is different to source.
This patch fixes the unit to same as source.

Change-Id: I25df51f8e88976d81bae4f36116b5ea2588f8a23
Merge "fix unit"