Partial wallet_basic.py Fix & 5 other Functional Test Fixes

[JaredTate]

This PR fixes 1 of 2 functional tests for wallet_basic.py and 5 other functional tests. This test wallet_basic.py is a doozy and after spending a few hours on it I figured I would share what I have done so far to see if anyone else has suggestions.

To test this:

Compile:

  ./autogen.sh
  ./configure
  make -j 8

Run Specific Functional Tests

test/functional/test_runner.py wallet_basic.py
test/functional/test_runner.py interface_digibyte_cli.py mining_basic.py mempool_unbroadcast.py rpc_signrawtransaction.py wallet_importprunedfunds.py 

I am still stuck on this error for 2nd wallet_basic.py test:

[JaredTate]

After this PR I still have 39 failing tests.

[ghost]

Nice work! @JaredTate

Same here 39 test Failed.
ACK Tested

[ycagel]

cACK. Excellent work @Jongjan88 and @JaredTate!

[gto90]

utACK