Fix error when xpress is imported before xpress_direct

[jsiirola]

Fixes #3406 .

Summary/Motivation:

This resolves a NameError if xpress was imported before xpress_direct

Changes proposed in this PR:

• Ensure XpressDirect is declared before attempting the xpress import

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1. I agree my contributions are submitted under the BSD license.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.66%. Comparing base (952e67b) to head (22a9dd1).
Report is 30 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3410   +/-   ##
=======================================
  Coverage   88.66%   88.66%           
=======================================
  Files         879      879           
  Lines      100365   100365           
=======================================
+ Hits        88991    88992    +1     
+ Misses      11374    11373    -1     

Flag	Coverage Δ
linux	86.12% <100.00%> (+<0.01%)	⬆️
osx	76.11% <100.00%> (+<0.01%)	⬆️
other	86.62% <100.00%> (+<0.01%)	⬆️
win	84.46% <100.00%> (-0.01%)	⬇️

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