Moved derive units to registry architectur

DeriveUnits are now owned by a DeriveRegistry which has its own routing
thread to handle routing values to the different DeriveUnits

src/dynalab_core/errors.py

@@ -11,10 +11,6 @@ class CoreStateMismatchError(CoreError):
     """DynaLab Core state error."""
 
 
-class CoreMultipleFunctionsFoundError(CoreError):
-    """DynaLab Core multiple functions found while trying to create derive unit."""
-
-
 # DLPak error declarations
 class DLPakError(Exception):
     """DLPak error."""
@@ -35,3 +31,16 @@ class DeriveUnitInvalidSignatureError(DeriveUnitError):
 
 class DeriveUnitArgsMismatchError(DeriveUnitError):
     """DeriveUnit incorrect arguments provided error."""
+
+
+class DeriveUnitMultipleFunctionsFoundError(DeriveUnitError):
+    """DynaLab Core multiple functions found while trying to create derive unit."""
+
+
+# DeriveRegistry error declarations
+class DeriveRegistryError(Exception):
+    """Generic ConnectorRegistry Error"""
+
+
+class DeriveRegistryAlreadyRegisteredError(DeriveRegistryError):
+    """ConnectorRegistry endpoint already registered"""