BERLIN (Reuters) - A senior member of parliament in Chancellor Angela Merkel's conservative Christian Democrats (CDU) said on Tuesday that a Greek exit from the euro zone would have to be accepted if the Athens government does not present a solid reform package. Michael Grosse-Broemer, the CDU's deputy floor leader in parliament, told reporters: "In the event a solid reform package is not presented, then a 'Grexit' would have to be accepted if necessary." (Reporting by Andreas Rinke; writing by Erik Kirschbaum; editing by Caroline Copley)