CI for OpenSUSE (#12)

* CI for OpenSUSE

* OpenSUSE MPI --allow-run-as-root

- when testing in OpenSUSE docker container, tests using OpenMPI fail due to running as root
- This commit toggles OMNITRACE_CI_MPI_RUN_AS_ROOT to ON and tests whether --allow-run-as-root is supported

* Tweak to OMNITRACE_CI_MPI_RUN_AS_ROOT handling

docker/Dockerfile.opensuse.ci

@@ -20,7 +20,8 @@ RUN zypper update -y && \
     zypper dist-upgrade -y && \
     zypper install -y -t pattern devel_basis && \
     zypper install -y python3-pip openmpi3-devel gcc-c++ git libnuma-devel dpkg-devel rpm-build papi-devel curl wget binutils-gold && \
-    python3 -m pip install 'cmake==3.18.4'
+    python3 -m pip install 'cmake==3.18.4' && \
+    zypper clean --all
 
 COPY ./dyninst-source /tmp/dyninst