VOL-1451 Openonu now runs using pyvoltha completely

Remove code that now exists in the library.  Modify include paths
Update requirements to more closely reflect pyvoltha requirements.txt

Change-Id: I94c619de82d8ee14cfeb302b3b82be3a26619301
diff --git a/python/adapters/brcm_openomci_onu/omci/brcm_mib_sync.py b/python/adapters/brcm_openomci_onu/omci/brcm_mib_sync.py
index 1898c52..e330be9 100644
--- a/python/adapters/brcm_openomci_onu/omci/brcm_mib_sync.py
+++ b/python/adapters/brcm_openomci_onu/omci/brcm_mib_sync.py
@@ -15,7 +15,7 @@
 
 import structlog
 from twisted.internet import reactor
-from voltha.extensions.omci.state_machines.mib_sync import MibSynchronizer
+from pyvoltha.adapters.extensions.omci.state_machines.mib_sync import MibSynchronizer
 
 log = structlog.get_logger()