Chore: Move to ubuntu2004-docker

Chore: Move to ubuntu2004-docker

jjb/aai/aai-aai-common.yaml
jjb/aai/aai-babel.yaml
jjb/aai/aai-graphadmin.yaml
jjb/aai/aai-graphgraph.yaml
jjb/aai/aai-model-loader.yaml
jjb/aai/aai-resources.yaml
jjb/aai/aai-schema-service.yaml
jjb/aai/aai-sparky-be.yaml
jjb/aai/aai-traversal.yaml
jjb/ccsdk/apps.yaml
jjb/cli/cli.yaml
jjb/dcaegen2/dcaegen2-analytics-tca-gen2.yaml
jjb/dcaegen2/dcaegen2-collectors-datafile.yaml
jjb/dcaegen2/dcaegen2-collectors-hv-ves.yaml
jjb/dcaegen2/dcaegen2-collectors-restconf.yaml

Issue-ID: CIMAN-33
Signed-off-by: Bengt Thuree <bthuree@linuxfoundation.org>
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: If1f1bdbf0c61acb634a5a5e6afb1479f32322ca9