Enhance parse_ignition file content decoding
Enhance parse_ignition file content decoding

Review of MCD/ignition code reveals that data is encoded
in file contents following RFC 2397.

This commit vendors in code from upstream python to support
more robust parsing of this scheme.

mwoodson/openshift-ansible,openshift/openshift-ansible,maxamillion/openshift-ansible,kwoodson/openshift-ansible,nak3/openshift-ansible,mwoodson/openshift-ansible,nak3/openshift-ansible,sdodson/openshift-ansible,tagliateller/openshift-ansible,tagliateller/openshift-ansible,rhdedgar/openshift-ansible,bparees/openshift-ansible,bparees/openshift-ansible,maxamillion/openshift-ansible,tagliateller/openshift-ansible,sdodson/openshift-ansible,sdodson/openshift-ansible,gburges/openshift-ansible,tagliateller/openshift-ansible,miminar/openshift-ansible,sdodson/openshift-ansible,miminar/openshift-ansible,miminar/openshift-ansible,gburges/openshift-ansible,miminar/openshift-ansible,miminar/openshift-ansible,maxamillion/openshift-ansible,kwoodson/openshift-ansible,sdodson/openshift-ansible,maxamillion/openshift-ansible,akram/openshift-ansible,akram/openshift-ansible,maxamillion/openshift-ansible,tagliateller/openshift-ansible,openshift/openshift-ansible,rhdedgar/openshift-ansible