increased sync threads
Disabled l3_ha by default.

This feature was supposed to solve for built in l3_ha in juno.
Sadly the l3_ha features is only half baked and some very serious
side effects which are reminiscent of 4.2.2. In order to maintain
stability l3_ha should be an experimental feature and only enabled
by the user when done so deliberately.
added ha dhcp agents to networks automatically