[CORD-578] MPLS ECMP configurable

Changes:
- Adds MPLS-ECMP option to SR configuration;
- Updates the json examples;
- Implements unit tests to verify the expected behaviors;

Change-Id: I6a7f5d34161be7c85ecb76c9a09288d960aad3cb
8 files changed
tree: 9a1362a767ac3f3dd5e62797f711312320fcd539
  1. BUCK
  2. app.xml
  3. features.xml
  4. pom.xml
  5. src/