fix(admin-ui): uploaded assets are not stored on server locations

[manojs1978]

Describe the bug
uploaded assets are not stored on server locations
To Reproduce
Steps to reproduce the behavior:
install jans/flex 1.1.6.nightly/ 5.1.6.nightly
check asset configuration is present for jar and jans-link service
upload jar file type of asset file
showing asset uploaded on screen but it is not stored at desired location
See error

Expected behavior
when any asset uploaded it should store at their desired location if configuration is present

Screenshots
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Desktop (please complete the following information):
OS: ubuntu 22
Browser [e.g. chrome, safari]
Version [e.g. 22]
-flex 5.1.6.nightly
-DB pgsql/mysql

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

[pujavs]

Analysis: Asset mapping for jans-lock and jans-link in document on the basis of which mapping configuration was written seems incorrect.
Mapping for *.jar should be /opt/jans/jetty/jans-lock/custom/libs rather than /opt/jans/jetty/jans-lock/custom-libs
Have asked @yurem for review.