[VOL-3245] Consume port capability on port creation

This commit consists of the changes needed in the Core to build
a logical port without having to request port capability from
the adapters.

This commit requires changes in the OLT and ONU adapters to be
completed.  These are tracked under jira
https://jira.opencord.org/browse/VOL-3202. Until the adapters
changes are committed this commit will not pass jenkins.

Change-Id: I0cae167375b9a8c67a83202e25abcec6ae013a88
diff --git a/vendor/github.com/pkg/errors/.travis.yml b/vendor/github.com/pkg/errors/.travis.yml
new file mode 100644
index 0000000..d4b9266
--- /dev/null
+++ b/vendor/github.com/pkg/errors/.travis.yml
@@ -0,0 +1,15 @@
+language: go
+go_import_path: github.com/pkg/errors
+go:
+  - 1.4.x
+  - 1.5.x
+  - 1.6.x
+  - 1.7.x
+  - 1.8.x
+  - 1.9.x
+  - 1.10.x
+  - 1.11.x
+  - tip
+
+script:
+  - go test -v ./...