DebbugerMainWindow fix warnings

QObject::disconnect: No such signal
Debugger::DebuggerRunConfigurationAspect::requestRunActionsUpdate() in /
src/plugins/debugger/debuggermainwindow.cpp:205
and QObject::connect at line 212

Also connections are ported to Qt5 style

Change-Id: I9ac1457209b0b1e32a1f7032135a3a12099b38a2
Reviewed-by: hjk <hjk121@nokiamail.com>