8055145: [TESTBUG] runtime/7158988/FieldMonitor.java fails with VMDisconnectedException
Summary: Exclude this test on JPRT and make it trivially pass if it gets a disconnected exception (which seems rare)
Reviewed-by: gtriantafill, sspitsyn, ctornqvi
8054174: minor buglet in computation of end of pc descs in libjvm_db.c
Summary: fixed scopes_pcs_end calculation
Reviewed-by: sspitsyn, sla
Contributed-by: Tom Rodriguez <tom.rodriguez@oracle.com>