Bug #1700065 has already handled adding libsrvg2-tools as a dependency for the iowatcher subpackage of blktrace, but it can't pass gating now because the libsrvg2-tools subpackage isn't yet available.
jwb has added libsrvg2-tools to the comps file already.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2019:3510