Update affiliation for core reviewers

Some core reviewers' affiliations are out of date. This commit updates
these records, and adds some missing real names in place of Launchpad IDs

    bcwaldon:        Add CoreOS affiliation
    clayg:           Include Clay's real name
    cthier:          Add missing info
    diane-fleming:   Add Ebay affiliation
    gholt:           Include Greg's real name
    rkukura:         Add Cisco affiliation
    stevendgonzales: Add EMC affiliation
    thingee:         Add Datera affiliation

Change-Id: I3f71b62724eec2e9dd51f4cc9c1bd0643f7f0fc9