Merge pull request #2189 in SNORT/snort3 from ~DAVMCPHE/snort3:fallback to master

Merge pull request #2189 in SNORT/snort3 from ~DAVMCPHE/snort3:fallback to master

Squashed commit of the following:

commit 0031d861c9c23b1a08e27a77d10d8ee68f4f7fb4
Author: davis mcpherson <davmcphe@cisco.com>
Date:   Fri May 1 13:23:54 2020 -0400

    dce_rpc: code style cleanups

commit 5a9614634d99202a0202494b6021116edea1d7e4
Author: davis mcpherson <davmcphe@cisco.com>
Date:   Wed Apr 29 11:24:49 2020 -0400

    dce_rpc: generate alert when dce splitter aborts due to invalid fragment length

commit 75e56ee0f0a6e875c13de32963b58f15e3c43c7f
Author: davis mcpherson <davmcphe@cisco.com>
Date:   Fri May 8 17:16:47 2020 -0400

    stream_tcp: call splitter->finish() before reassemble() when flushing when PAF aborts due to gap in queued data

commit 39336beb1c4421ebb2124a2beb20ae1c8a5ae9b1
Author: russ <rucombs@cisco.com>
Date:   Tue Apr 21 14:20:50 2020 -0400

    stream_tcp: clear gadget from Flow object once fallback has happened in both directions

    stream_tcp: when paf aborts due to gap in data set splitter state to ABORT

    stream_tcp: only clear gadget after both splitters have aborted

    loggers: when logging alert only use inspector buffers and name when the inspector's paf splitter is assigned for the direction of the alert"