Fixed compile error (long/int type mismatch) in call to StatusReporter.report by changing StatusReporter.report interface.

StatusReporter.report (and its implementation
HttpStatusReporter.report) expected an int for its second parameter,
totalops. Compile error reported in call to StatusReporter.report in
Client.java. Recent changes to the source have changed int->long to
avoid numeric overflow on huge runs. Changed the StatusReporter
interface to accept a long instead of an int for totalops.