tests: clean up sed filtering of test output

tests: clean up sed filtering of test output

The sed filters for test outputs that are used to remove build and
test specific information (such as version strings, dates, times,
UUIDs) were unconditionally deleting the first line of output.  This
would normally contain the tool version string, but in some cases
contained other information that was being lost.  This can lead to
difficulty debugging test failures.

The sed filtering has been changed to only remove the actual version
strings.  As well, similar filter strings were duplicated throughout
many scripts, and "sed" and "tr" were often called multiple times in
a pipeline.  These have been consolidated into a single filter.sed
file to avoid having to maintain these filters in multiple places.

In a few cases, accidentally deleted messages have been restored to
the expect output for the tests.  In other cases, trivial whitespace
has been changed in the expect files.

Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>