Updates:

Updates:

    * Switch to python3.8
    * Switch to SI95 from NNG (rmr v3 vs rmr v1)
    * The switch to SI95 led to a rabbit hole in which we eventually discovered that rmr_send may sometimes block for an arbitrary period of time. Because of this issue, a1's sends are now threaded. Please see the longer comment about this in a1rmr.
    * Bump version of py xapp frame (SDL used only) in A1
    * Bump version of go xapp frame (0.0.24 -> 0.4.2) in integration tests
    * Add some additional logging in A1

Issue-ID: RIC-156
Change-Id: I8ed5356bea60a3ccea6fa2d03981ad634b98bab1
Signed-off-by: Tommy Carpenter <tc677g@att.com>