Add more configurability to Netconf device configurator

The Configure_Device_On_Netconf now got "address", "port",
"user" and "password" arguments that specify these
configuration options for the device. This is needed to be
able to connect to non-testtool devices which have real
authentication and live on different address:port than
the testtool ones live.

Change-Id: I22c541302bfc2c9d78eee18358654aaaa1baf052
Signed-off-by: Jozef Behran <jbehran@cisco.com>