Allow generic ipvs scheduler flags

[jsravn]

ipvs/ipvsadm support the generic flags 'flag-1', 'flag-2', and 'flag-3' for custom schedulers. Currently gorb rejects those flags as invalid. This patch changes gorb to allow those flags.

[kobolog]

It would be nice if all the tests still pass with this PR =) Then I'll merge it.

[jsravn]

@kobolog It looks like a bug w/ the travis build?

[INFO]  Replacing existing vendor dependencies
[INFO]  Removing nested vendor and Godeps/_workspace directories...
[INFO]  Removing: /home/travis/gopath/src/github.com/kobolog/gorb/vendor/github.com/coreos/etcd/cmd/vendor
[ERROR] Unable to strip vendor directories: open /home/travis/gopath/src/github.com/kobolog/gorb/vendor/github.com/coreos/etcd/cmd/vendor: no such file or directory
An Error has occurred

[jsravn]

Rebased on master to fix conflicts - hopefully it will fix the build as well.

[codecov-io]

Codecov Report

Merging #49 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #49   +/-   ##
=======================================
  Coverage   39.42%   39.42%           
=======================================
  Files          18       18           
  Lines         804      804           
=======================================
  Hits          317      317           
  Misses        457      457           
  Partials       30       30

Impacted Files	Coverage Δ
core/context.go	18.83% <ø> (ø)	:arrow_up:

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[jsravn]

@kobolog Good to go!

[kobolog]

👍