travis: install systemsim-p8 on centos6

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

opal-ci/Dockerfile-centos6

@@ -4,6 +4,8 @@ RUN yum -y install wget curl xterm gcc git xz ccache
 RUN wget https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.8.0/x86_64-gcc-4.8.0-nolibc_powerpc64-linux.tar.xz
 RUN mkdir /opt/cross
 RUN tar -C /opt/cross -xf x86_64-gcc-4.8.0-nolibc_powerpc64-linux.tar.xz
+RUN curl -O http://public.dhe.ibm.com/software/server/powerfuncsim/p8/packages/v1.0-2/systemsim-p8-1.0-2.el6.x86_64.rpm
+RUN yum -y install systemsim-p8-1.0-2.el6.x86_64.rpm
 COPY . /build/
 WORKDIR /build
 ENTRYPOINT ./opal-ci/build-centos6.sh