fix(base node): read scylla-server file with sudo
fix(base node): read scylla-server file with sudo

Task: https://trello.com/c/MyT25VCr/4263-cloud-longevity-fail-to-get-scyllaargs

To find 'SMP' property we read 'scylla-server' file. When a test run on AWS this file
has read permission for root user only. Use sudo

scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests