Remove internal calls to deprecated methods

[brianr]

There are still some internal calls to the deprecated methods Rollbar.report_exception and Rollbar.report_message:

lib/rollbar/better_errors.rb
18:        exception_data = Rollbar.report_exception(exception, request_data, person_data)

lib/rollbar/delayed_job.rb
13:            ::Rollbar.report_exception(e, data)

lib/rollbar/goalie.rb
13:        exception_data = Rollbar.report_exception(exception, request_data, person_data)

lib/rollbar/rake.rb
7:      Rollbar.report_exception(ex)

lib/rollbar/sidekiq.rb
14:          Rollbar.report_exception(e, :params => params)
31:      Rollbar.report_exception(e, :params => params)

spec/dummyapp/app/controllers/home_controller.rb
22:      Rollbar.report_exception(e)

spec/rollbar_spec.rb
1130:        Rollbar.report_exception(exception)
1153:            Rollbar.report_exception(exception)

lib/rollbar/rake_tasks.rb
22:    Rollbar.report_message("Test error from rollbar:test", "error")

spec/rollbar_spec.rb
912:      Rollbar.report_message("Test message")
921:      Rollbar.report_message("Test message that should be ignored")
930:      Rollbar.report_message("Test message with extra data", 'debug', :foo => "bar",

These should be changed to use Rollbar.error() instead. (The calls in spec/rollbar_bc_spec.rb should of course remain.)