ISSUE:

Controller does not format TOS match field as specified by OF1.0 spec.
CHANGE:
- In protocol_plugin when converting SAL Match to OFMatch have TOS bits to be msb and viceversa
- Added utilities functions in NetUtils for deriving unsigned values for primitive
  types byte and short when needed for comparisons and bit shifting operations.
  Made use of them throughout the code.

Change-Id: Ia0505921b46627825c27d18229f1e1b626ce3d7d
Signed-off-by: Alessandro Boch <aboch@cisco.com>