Merge pull request #1836 in SNORT/snort3 from ~DAVMCPHE/snort3:stream_tcp_tsm_tsan_pa...

Merge pull request #1836 in SNORT/snort3 from ~DAVMCPHE/snort3:stream_tcp_tsm_tsan_patch to master

Squashed commit of the following:

commit bc8abc4b89ad76dbf294cc5e09c4d643d19607d8
Author: davis mcpherson <davmcphe@cisco.com>
Date:   Wed Nov 6 11:40:38 2019 -0500

    stream_tcp: initialize tcp state machine instance in the stream_tcp plugin init method to ensure
    it is created before the packet threads are started.  in addition the state machine is deleted
    in the stream_tcp plugin term method to free up allocated memory before snort exits.