Update horizon chart version from 0.2.16 to 0.2.20

    - 0.2.17 Add custom logo
    - 0.2.18 Enable taint toleration for Openstack services
    - 0.2.19 Remove unsupported value overrides
    - 0.2.20 Add SHOW_OPENRC_FILE value

Sem-Ver: feature
Change-Id: I86845739fd85def082caae2f573199c68f9b80a2
2 files changed