Removed deprecated instruction MAINTAINER (#8846)

Co-authored-by: dahn <daan@onecht.net>
Co-authored-by: Wei Zhou <weizhou@apache.org>

Author: 3 people

tools/docker/Dockerfile

@@ -19,8 +19,7 @@
 
 FROM ubuntu:22.04
 
-MAINTAINER "Apache CloudStack" <dev@cloudstack.apache.org>
-LABEL Vendor="Apache.org" License="ApacheV2" Version="4.18.3.0-SNAPSHOT"
+LABEL Vendor="Apache.org" License="ApacheV2" Version="4.18.3.0-SNAPSHOT"  Author="Apache CloudStack <dev@cloudstack.apache.org>"
 
 ARG DEBIAN_FRONTEND=noninteractive
 

tools/docker/Dockerfile.marvin

@@ -19,8 +19,7 @@
 # build for cloudstack_home_dir not this folder
 FROM python:2
 
-MAINTAINER "Apache CloudStack" <dev@cloudstack.apache.org>
-LABEL Vendor="Apache.org" License="ApacheV2" Version="4.18.3.0-SNAPSHOT"
+LABEL Vendor="Apache.org" License="ApacheV2" Version="4.18.3.0-SNAPSHOT"  Author="Apache CloudStack <dev@cloudstack.apache.org>"
 
 ENV WORK_DIR=/marvin
 

tools/docker/Dockerfile.smokedev

@@ -19,8 +19,7 @@
 
 FROM ubuntu:16.04
 
-MAINTAINER "Apache CloudStack" <dev@cloudstack.apache.org>
-LABEL Vendor="Apache.org" License="ApacheV2" Version="4.12.0-SNAPSHOT"
+LABEL Vendor="Apache.org" License="ApacheV2" Version="4.12.0-SNAPSHOT" Author="Apache CloudStack <dev@cloudstack.apache.org>"
 
 RUN apt-get -y update && apt-get install -y \
     genisoimage \

ui/Dockerfile

@@ -19,11 +19,11 @@
 
 FROM node:14-bullseye AS build
 
-MAINTAINER "Apache CloudStack" <dev@cloudstack.apache.org>
 LABEL Description="Apache CloudStack UI; Modern role-base progressive UI for Apache CloudStack"
 LABEL Vendor="Apache.org"
 LABEL License=ApacheV2
 LABEL Version=0.5.0
+LABEL Author="Apache CloudStack <dev@cloudstack.apache.org>"
 
 WORKDIR /build