Add rsync into the docker image

tools/docker/Dockerfile.aliyunlinux3

@@ -66,7 +66,8 @@ RUN yum install -y --nogpgcheck \
         protobuf-compiler \
         protobuf-c-compiler \
         protobuf-c-devel \
-        protobuf-devel && \
+        protobuf-devel \
+        rsync && \
     yum groupinstall -y 'Development Tools' && \
     yum clean all && \
     alternatives --set python /usr/bin/python3

tools/docker/Dockerfile.centos8.2

@@ -49,6 +49,7 @@ RUN yum install epel-release -y && \
     uuid-devel \
     vim \
     yum-utils \
+    rsync \
     http://downloads.sourceforge.net/ltp/lcov-1.14-1.noarch.rpm &&\
     alternatives --set python /usr/bin/python2
 

tools/docker/Dockerfile.ubuntu18.04

@@ -59,6 +59,7 @@ RUN apt-get update && DEBIAN_FRONTEND="noninteractive" apt-get install -y --no-i
         zip \
         gnupg \
         aptitude \
+        rsync \
         && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*