Description of problem:

Currently during upload files with different SHA256 but same filename are getting overwritten in the index. This is not desired. The SHA must stay the same for 1 filename.

Version numbers (base image, wheels, builder, etc):
All pulp indexes

Steps to Reproduce:

    
    1. build the same package in two different collections, they will have different sha256
    2. try to upload them to an index where such file exists
    3. The sha will be changed which is not desired
    

Actual results:

  The SHA of the alredy present SHA is changed 

Expected results:

   The file already in index will retain its SHA.   

Additional info: