added docker version check
added docker version check


Former-commit-id: 13ba0e4e7688738f0dbb7dd03a499d9f5d4c2f82
tomdee/libnetwork-plugin,projectcalico/libnetwork-plugin,robbrockbank/libcalico,TrimBiggs/libcalico,caseydavenport/libcalico,TrimBiggs/libnetwork-plugin,plwhite/libcalico,L-MA/libcalico,insequent/libcalico,tomdee/libcalico,alexhersh/libcalico,TrimBiggs/libnetwork-plugin,projectcalico/libcalico,djosborne/libcalico,Symmetric/libcalico