fix(test_stop_compaction): fix for reshape tests
fix(test_stop_compaction): fix for reshape tests

Due wrong default value the same test was executed twice.
Also because reshape already happened, the second test didn't
run reshape at all.
Fix is setting proper default value and change compaction strategy
for reshape_on_boot test.

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