Path Computation Algorithms

Path Computation Algorithms

Initial commit of Path Computation Algorithms implementation.

This is the 2/3 Patch Set to implement a full featured PCE server
in conformity to RFC5440. It provides three different algorithms
able to compute paths between end points by taking into account
different constraints:
 - A simple Shortest Path First that takes into account only
   standard IGP metric
 - A Constrained Shortest Path First (CSPF) that takes into
   account the TE Metric and Bandwidth for constraints
 - SAMCRA algorithm that takes into account TE Metric, Delay,
   Loss and Bandwidth for constraints

Details information about how the various algorithms are implemented
and how to use them will be provided in docs/algo directory.

JIRA: BGPCEP-858

Signed-off-by: Olivier Dugeon <olivier.dugeon@orange.com>
Co-authored-by: Philippe Niger <philippe.niger@orange.com>
Co-authored-by: Philippe Cadro <philippe.cadro@orange.com>
Change-Id: Ifbcf2a65aef08c3fa95a2be54eb53ffdf55dd417