images/facsimiles with explore bitmask for authenticated users are not visible in web app

[danieleguido]

Check explore bitmask to allow content display in webapp (even when copyright field is "in_cpy"). One content item for this use case is the following:
https://dev.impresso-project.ch/app/content-item/IMP-1938-09-08-a-i0061

Relevant fields of the content item:

"access": { 
    "copyright": "in_cpy", 
    "dataDomain": "prt", 
    "accessBitmaps": { 
        "explore": "AAAAAAAAAAI=", 
        "getTranscript": "AAAAgAAAAAA=",
        "getImages": "AAAAgAAAAAA=" 
    }
}

explore value is:
0000000000000000000000000000000000000000000000000000000000000010
while get Transcript is domain specific:
0000000000000000000000001000000000000000000000000000000000000000

Authenticated basic users have the same bitmask as explore field, they should be able to see the item in the web app.