[CIDRPool 2/x] Add controller for CIDRPool CRD

[ykulazhenkov]

Contains implementation for CIDRPool controller

[coveralls]

coverage: 70.076% (-2.0%) from 72.083%
when pulling c6a80a2 on ykulazhenkov:pr-cidr-pool-controller
into 18fc6a0 on Mellanox:main.

[coveralls]

coverage: 70.0% (-2.1%) from 72.083%
when pulling 8693daf on ykulazhenkov:pr-cidr-pool-controller
into 18fc6a0 on Mellanox:main.

[ykulazhenkov]

@vasrem Thanks again for the reviews. I think I addressed all comments in this PR. Please, take another look

[coveralls]

coverage: 70.0% (-2.1%) from 72.083%
when pulling 803489b on ykulazhenkov:pr-cidr-pool-controller
into 18fc6a0 on Mellanox:main.

[coveralls]

coverage: 70.0% (-2.1%) from 72.083%
when pulling e3b3483 on ykulazhenkov:pr-cidr-pool-controller
into 18fc6a0 on Mellanox:main.

[coveralls]

coverage: 70.0% (-0.5%) from 70.538%
when pulling f8465ca on ykulazhenkov:pr-cidr-pool-controller
into 3ddd30f on Mellanox:main.

[coveralls]

coverage: 70.0% (-0.5%) from 70.538%
when pulling ef1e45c on ykulazhenkov:pr-cidr-pool-controller
into 3ddd30f on Mellanox:main.

[coveralls]

coverage: 70.0% (-0.5%) from 70.538%
when pulling 8324b83 on ykulazhenkov:pr-cidr-pool-controller
into 3ddd30f on Mellanox:main.