Move cpu_shares and cpuset_cpu to HostConfig when API >= 1.18

[joshpurvis]

This PR moves the cpu_share and cpuset_cpus options to HostConfig, per the Docker remote API >= 1.18.

Previously cpu_share and cpuset arguments were passed into create_container as kwargs. I've added an InvalidVersion exception there, when the API version is < 1.18 and these arguments are passed. I can't seem to find documentation for < 1.18 to know if this should be a warning instead?

I should also note I've renamed cpuset to cpuset_cpus to match the existing container_update functionality, which is already expecting these being in HostConfig.

Related issues: #1030, docker/compose#3284, docker-archive/classicswarm#1983

[joshpurvis]

I've pushed a change/rebased the branch to fix an issue with the InvalidVersion error on the earlier API versions. (I had the API version comparison reversed in create_container_config.)

I also switched it from an error to a deprecation warning, as this mistake made me realize the old cpushare/cpuset unit tests would be broken when testing against newer API versions. (those that still pass these as kwargs into create_container:

docker-py/tests/unit/container_test.py

Line 270 in 7de30c3

def test_create_container_with_cpu_shares(self):

)

Let me know if the old unit tests should simply be removed.

[shin-]

Thanks, changes LGTM!