rosbag fix drops latching

[oceanusxiv]

Hi

This is related to some of the issues mentioned before, namely #679 and #1049. Fundamentally this is the same issue, and the fix has been implemented in the underlying rosbag API. However specifically the fix has not seem to be propagated to the rosbag fix command, which still drops latching for /tf_static. Here's a minimal example.

test_2019-03-25-10-59-22.zip

then run

rosbag fix test_2019-03-25-10-59-22.bag test_2019-03-25-10-59-22_fixed.bag placeholder.bmr

placeholder.bmr is an empty file just to make the tool happy.

The result should be that the /tf_static topic going from latching to non latching between the old and new bag.

A cursory look at the python script seems to indicate that the fixbag2 function seems to still be using the old interface which is causing this issue.