rhel7 dependency fix

docker/Dockerfile.upf-vpp.rhel7

@@ -91,7 +91,8 @@ RUN yum repolist --disablerepo=* && \
       tshark \
       tzdata\
       iproute \
-      wget && \
+      wget \
+      https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm && \
     wget http://repo.openfusion.net/centos7-x86_64/hyperscan-devel-5.3.0-1.of.el7.x86_64.rpm \
          http://repo.openfusion.net/centos7-x86_64/hyperscan-5.3.0-1.of.el7.x86_64.rpm && \
     rpm -i *.rpm && \
@@ -99,6 +100,8 @@ RUN yum repolist --disablerepo=* && \
     yum remove -y wget && \
     rm -rf /var/lib/apt/lists/*
 
+RUN yum install -y python-pip && pip install termcolor
+
 WORKDIR /openair-upf/bin
 COPY --from=vpp-upf-builder /vpp-upf/scripts/entrypoint.sh .
 COPY --from=vpp-upf-builder /vpp-upf/vpp/build-root/install-vpp-native/vpp/bin/vpp .