gbproxy: Allow dynamic connect/disconnect of ConnHdlr at runtime

We want to move a virtual subscriber between BVC with one NSE,
but also to other NSE/PCU at runtime.  The number of BVC and NSE
may be large in a given test config, and we really don't need
hundreds of test ports per component;  Instead, reconnect the
test ports to whichever BVC we want at runtime.

Change-Id: I56b088b582f2d070547ee24f2d7a175d84fb5861
1 file changed