Add support for Amazon EFA

Issue addressed #167
    
    The upstream JAX container contains only MOFED NIC support. The MOFED package
    from Mellanox that we use installs *ibverbs* libraries which do not contain
    libefa*.so which are required for AWS.
    
    A temporary solution is to provide a script as a part of base container
    (/usr/local/bin/install-efa.sh) that AWS user can run inside the container
    to handle this issue.
    The script does the following:
    1. Remove all *ibverbs* and RDMA related libraries
    2. Download Amazon EFA installer
    3. Install EFA

.github/container/install-efa.sh

@@ -25,7 +25,7 @@ pushd ${WORKDIR}
 AMAZON_EFA_LINK="https://efa-installer.amazonaws.com/aws-efa-installer-${EFA_INSTALLER_VERSION}.tar.gz"
 curl -O "$AMAZON_EFA_LINK" 
 tar -xf aws-efa-installer-${EFA_INSTALLER_VERSION}.tar.gz && cd aws-efa-installer
-./efa_installer.sh -y --skip-kmod
+./efa_installer.sh -y -g -d --skip-kmod --skip-limit-conf --no-verify
 
 popd