Add Pagination to Neutron Networks Northbound API

This commit adds pagination to the neutron network northbound API.
It is based on the information at the following link.
http://docs.openstack.org/api/openstack-network/2.0/content/pagination.html

In addition to not providing a "next" link on the last page of results this
implementation does not have a "previous" link on the first page.

Change-Id: I2c048c9cdc907d759e62fb8850b76cfa293b7fd2
Signed-off-by: Dave Tucker <dave.j.tucker@hp.com>
BUG-372 Add reconnecting to netconf-connector for unexpected session drop

Netconf connector will reattempt connection if the session to remote device is dropped.
Increase sleep factor in netconf connector from 1.0 to 1.5.
This prevents connection attempt every second in case remote device is not comming back for longer time.
Connection attempts span increases gradually.

Change-Id: Icc4b993942e9cc6897c0da858eb867afa4c8aa87
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Merge "BUG-372 Add reconnecting to netconf-connector for unexpected session drop"
Merge "Add Pagination to Neutron Networks Northbound API"