Problem: openapi-generator-cli image is not up to date

Solution: temporarily switch to openapi-generator:cli-latest

re: #4691
https://pulp.plan.io/issues/4691

Author: dkliban

generate.sh

@@ -16,26 +16,27 @@ fi
 
 if [ $2 = 'python' ]
 then
-    docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate \
+    docker run --rm -v ${PWD}:/local openapitools/openapi-generator:cli-latest generate \
         -i /local/api.json \
         -g python \
         -o /local/$1-client \
         -DpackageName=pulpcore.client.$1 \
         -DprojectName=$1-client \
-        -DpackageVersion=${VERSION}
+        -DpackageVersion=${VERSION} \
         --skip-validate-spec
     cp python/__init__.py $1-client/pulpcore/
     cp python/__init__.py $1-client/pulpcore/client
 fi
 if [ $2 = 'ruby' ]
 then
-    docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate \
+    docker run --rm -v ${PWD}:/local openapitools/openapi-generator:cli-latest generate \
         -i /local/api.json \
         -g ruby \
         -o /local/$1-client \
         -DgemName=$1_client \
         -DgemLicense="GPLv2" \
-        -DgemVersion=${VERSION}
+        -DgemVersion=${VERSION} \
+        --skip-validate-spec
 fi
 
 rm api.json