Remove support for specifying version

Remove support for specifying version:

• docker version should be specified in role vars, for
• docker-compose version should be specified in role vars
• same version of docker-ce and docker-ce-cli should be installed

What about different packages:

ok: [centos-7] => {
    "symetric_diff": [
        "gpg-pubkey-621e9f35-58adea78", 
        "docker-ce-cli-18.09.4-3.el7.x86_64", 
        "docker-ce-18.09.0-3.el7.x86_64", 
        "containerd.io-1.2.5-3.1.el7.x86_64", 
        "container-selinux-2.74-1.el7.noarch"
    ]
}

Packages obtained from docker repository on centos(it look like their version is releated):

• docker-ce-cli
• docker-ce
• containerd.io