Fix REST api for content-types that start with "admin"

[petersg83]

fix #9017

[codecov]

Codecov Report

Merging #9128 (a9a238b) into master (df33626) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #9128   +/-   ##
=======================================
  Coverage   34.64%   34.64%           
=======================================
  Files        1308     1308           
  Lines       14431    14431           
  Branches     1432     1432           
=======================================
+ Hits         4999     5000    +1     
+ Misses       8518     8517    -1     
  Partials      914      914           

Flag	Coverage Δ
front	26.04% <ø> (ø)
unit	54.87% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...manager/services/utils/configuration/attributes.js	57.83% <100.00%> (+1.20%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1e8a8b0...9edb3b0. Read the comment docs.

[derrickmehaffy]

Tested on a fresh v3.4.3 with the modifications applied. Works as expected