Update Dockerfile.irods_plugin_s3

ci/centos7_4_2_7/Dockerfile.irods_plugin_s3

-#FROM centos:7
 FROM eudat-docker-public.artie.ia.surfsara.nl/b2safe_b2container_centos7_4_1_12:latest
-
-# Build prerequisites
-RUN yum update -y && yum install -y libxml2-devel libcurl4-gnutls-devel libs3
-RUN yum update -y irods-devel irods-runtime irods-icommands irods-externals-libs
-
-#RUN git clone -b 4-2-stable https://gitlab.eudat.eu/m.carpen/irods_resource_plugin_s3
-
-################################################################################
-#
-# install S3 plugin
-#
-################################################################################
-#just working with rpm packages
-RUN wget https://packages.irods.org/yum/pool/centos7Workstation/x86_64/irods-externals-libs3a30e55e8-1-1.0-1.x86_64.rpm
-RUN rpm -ivh ./irods-externals-libs3a30e55e8-1-1.0-1.x86_64.rpm
-
-RUN wget https://packages.irods.org/yum/pool/centos7/x86_64/irods-resource-plugin-s3-4.2.8.0-1.x86_64.rpm
-RUN rpm -ivh ./irods-resource-plugin-s3-4.2.8.0-1.x86_64.rpm
-    
-# Prepare minio s3 configuration file
-RUN pwd
-RUN touch ./AWS.keypair
-#RUN cat "MINIO_ACCESS_KEY=minio" >> ./AWS.keypair
-#RUN cat "MINIO_SECRET_KEY=minio123" >> ./AWS.keypair
-
-RUN export MINIO_ACCESS_KEY=minio
-RUN export MINIO_SECRET_KEY=minio123
-
 ################################################################################
 #
 # add hook script