a-h-event: don't spam system logs

Don't print messages about invalid dump directories so many times.
Every dump directory has at leas 4 post-create events and after end of
each of these events abrt-handle-event tries to find duplicates. It
means 4x opens every dump directory, so it prints 4 lines for a single
invalid dump directory.

This patch dissables the error messages in the default log mode.

Related to rhbz#1133674

Signed-off-by: Jakub Filak <jfilak@redhat.com>
a-a-s-p-data: reduce amount of error messages

Read each GPG key only once. The GPG key dirs may contain many symlinks
and if their target cannot be read, then we print an error message for
every symlink pointing to the unreadable file. What's worse, the error
messages show a path to the target, so users see several identical
messages in the system logs.

Related to rhbz#1133674

Signed-off-by: Jakub Filak <jfilak@redhat.com>
dbus: don't ignore errors in verbose logging modes

Ignoring of errors even in higher levels of verbosity makes debugging
really hard.

Related to rhbz#1133674

Signed-off-by: Jakub Filak <jfilak@redhat.com>
logging: less log messages for duplicates

Related to rhbz#1133674

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Merge branch 'rhbz1133674_dont_spam'