add segment test=develop

tools/Dockerfile

@@ -7,8 +7,9 @@ RUN yum -y install wget && \
     yum -y install libXrender-0.9.10-1.el7.x86_64 --setopt=protected_multilib=false && \
     yum -y install libXext-1.3.3-3.el7.x86_64 --setopt=protected_multilib=false && \
     yum -y install python3 python3-devel && \
-    yum clean all && \
-    curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && \
+    yum clean all 
+
+RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && \
     python get-pip.py && rm get-pip.py && \
     localedef -c -i en_US -f UTF-8 en_US.UTF-8 && \
     echo "export LANG=en_US.utf8" >> /root/.bashrc

tools/Dockerfile.devel

 FROM centos:7.3.1611
 RUN yum -y install wget >/dev/null \
     && yum -y install gcc gcc-c++ make glibc-static which >/dev/null \
-    && yum -y install git openssl-devel curl-devel bzip2-devel python-devel >/dev/null \
-    && wget https://cmake.org/files/v3.2/cmake-3.2.0-Linux-x86_64.tar.gz >/dev/null \
+    && yum -y install git openssl-devel curl-devel bzip2-devel python-devel
+
+RUN wget https://cmake.org/files/v3.2/cmake-3.2.0-Linux-x86_64.tar.gz >/dev/null \
     && tar xzf cmake-3.2.0-Linux-x86_64.tar.gz \
     && mv cmake-3.2.0-Linux-x86_64 /usr/local/cmake3.2.0 \
     && echo 'export PATH=/usr/local/cmake3.2.0/bin:$PATH' >> /root/.bashrc \
-    && rm cmake-3.2.0-Linux-x86_64.tar.gz \
-    && wget https://dl.google.com/go/go1.14.linux-amd64.tar.gz >/dev/null \
+    && rm cmake-3.2.0-Linux-x86_64.tar.gz 
+
+RUN wget https://dl.google.com/go/go1.14.linux-amd64.tar.gz >/dev/null \
     && tar xzf go1.14.linux-amd64.tar.gz \
     && mv go /usr/local/go \
     && echo 'export GOROOT=/usr/local/go' >> /root/.bashrc \
     && echo 'export PATH=/usr/local/go/bin:$PATH' >> /root/.bashrc \
-    && rm go1.14.linux-amd64.tar.gz \
-    && yum -y install python-devel sqlite-devel >/dev/null \
+    && rm go1.14.linux-amd64.tar.gz 
+
+RUN yum -y install python-devel sqlite-devel >/dev/null \
     && curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py >/dev/null \
     && python get-pip.py >/dev/null \
     && pip install google protobuf setuptools wheel flask >/dev/null \
-    && rm get-pip.py \
-    && yum install -y python3 python3-devel \
+    && rm get-pip.py 
+
+RUN yum install -y python3 python3-devel \
     && pip3 install google protobuf setuptools wheel flask \
     && yum -y install epel-release && yum -y install patchelf libXext libSM libXrender\
     && yum clean all \

tools/Dockerfile.gpu

@@ -8,10 +8,12 @@ RUN yum -y install wget && \
     yum -y install libXrender-0.9.10-1.el7.x86_64 --setopt=protected_multilib=false && \
     yum -y install libXext-1.3.3-3.el7.x86_64 --setopt=protected_multilib=false && \
     yum -y install python3 python3-devel && \
-    yum clean all && \
-    curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && \
-    python get-pip.py && rm get-pip.py && \
-    ln -s /usr/local/cuda-9.0/lib64/libcublas.so.9.0 /usr/local/cuda-9.0/lib64/libcublas.so && \
+    yum clean all
+
+RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && \
+    python get-pip.py && rm get-pip.py
+
+RUN ln -s /usr/local/cuda-9.0/lib64/libcublas.so.9.0 /usr/local/cuda-9.0/lib64/libcublas.so && \
     echo 'export LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH' >> /root/.bashrc && \
     ln -s /usr/local/cuda-9.0/targets/x86_64-linux/lib/libcudnn.so.7 /usr/local/cuda-9.0/targets/x86_64-linux/lib/libcudnn.so && \
     echo 'export LD_LIBRARY_PATH=/usr/local/cuda-9.0/targets/x86_64-linux/lib:$LD_LIBRARY_PATH' >> /root/.bashrc && \