Use six.StringIO/BytesIO instead of StringIO.StringIO

to keep Python 3.x compatibility, use six.StringIO/BytesIO to
replace StringIO.StringIO

StringIO works for unicode
BytesIO works for bytes

Change-Id: I3892098e31d8d6984d58136110aae653dc4047ab
Closes-Bug: #1280100
Implements an LBaaS driver for NetScaler devices

This driver for the Neutron LBaaS plugin allows for
using the Citrix NetScaler loadbalancing devices
to provide Neutron LBaaS functionality in OpenStack.

Change-Id: Ibfeb54c4402943fb3696a1c599fa373e42e520d4
Implements: blueprint netscaler-lbaas-driver
Merge "Use six.StringIO/BytesIO instead of StringIO.StringIO"
Merge "Implements an LBaaS driver for NetScaler devices"