[ISSUE #7398] Fix ExportConfigsCommand NPE

[shirenchuang]

Which Issue(s) This PR Fixes

Fixes #7398

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Merging #7399 (0b07733) into develop (d7e5c4d) will increase coverage by 0.05%.
Report is 1 commits behind head on develop.
The diff coverage is 0.00%.

@@              Coverage Diff              @@
##             develop    #7399      +/-   ##
=============================================
+ Coverage      42.53%   42.59%   +0.05%     
- Complexity      9441     9454      +13     
=============================================
  Files           1150     1150              
  Lines          82746    82734      -12     
  Branches       10778    10778              
=============================================
+ Hits           35196    35239      +43     
+ Misses         43139    43075      -64     
- Partials        4411     4420       +9     

Files	Coverage Δ
...tmq/tools/command/export/ExportConfigsCommand.java	0.00% <0.00%> (ø)

... and 26 files with indirect coverage changes

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