Fix invalid constructors in record class generated by cobj-api

[yutaro-sakamoto]

This pull request includes changes to improve the naming consistency of record classes in the libcobj module.

Naming Consistency Improvements:

• libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/user_util/cobj_api/ApiFiles.java: Updated the record class name to use programId for dynamic naming.
• libcobj/app/src/test/java/jp/osscons/opensourcecobol/libcobj/user_util/cobj_api/testRecord.txt: Renamed the LOANSUBRecord to testRecord for consistency.