scyllatop: more coding style fixes
scyllatop: more coding style fixes

tools/scyllatop/metric.py:2:1: F401 're' imported but unused
tools/scyllatop/metric.py:53:20: E221 multiple spaces before operator
tools/scyllatop/metric.py:69:20: E221 multiple spaces before operator

Signed-off-by: Alexys Jacob <ee25f2b26a23c85eb2940a5214ecb1801c877d19@gentoo.org>
Message-Id: <20180917153308.7240-1-ee25f2b26a23c85eb2940a5214ecb1801c877d19@gentoo.org>

scylladb/scylla,avikivity/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla