cleaning licenses in other images #236

For each of the
openserverless-operator:
/Dockerfile

openserverless-streamer
/Dockerfile

openserverless-devcontainer
/Dockerfile

admin-api
/Dockerfile

send a PR adding alongside each Dockerfile (in the same folder) with 3 files
DISCLAIMER (the ASF disclaimer take it from openserverless)
NOTICE (a list of all the third part libraries)
LICENSE (list of the license of the)
WARN (list of incompabile libraries with ASF to be removed)
https://www.apache.org/legal/resolved.html