try setting SSL_CERT_FILE

Author: Jeff Whitaker

config.sh

@@ -301,6 +301,8 @@ function run_tests {
     #if [ -n "$IS_MACOS" ]; then # for now only run on MacOS since linux fails
        URL='https://icdc.cen.uni-hamburg.de/thredds/dodsC/ftpthredds/hamtide/m2.hamtide11a.nc'
        export CURLOPT_VERBOSE=1
+       ls -l /etc/ssl
+       export SSL_CERT_FILE=/etc/ssl/certs
        python -c "from netCDF4 import Dataset; nc=Dataset(\"${URL}\"); print(nc)"
     #fi
 }