Issue title: Revive Adserver 5.0.3 doesnt work capping
 Issue body: Revive Adserver version 5.0.3 doesnt work any capping set on campaign or banner. For example if i set campaign capping 1 for session, adserver display banner  each refresh (reloading ctr+R) of page without limit.

 Comments: 
 Comment 0: Please make sure you use HTTPS if you want capping to work.
 Comment 1: We have set everything via HTTPS. I tried install version 5.0.2 the same setup and capping working well. Version 5.0.3 doesn’t. 

I can send you login details to Revive Adserver admin 5.0.3 so you can see setup.

Here is test page [url redacted] where u can see that banner with capping 1 adserver diplay each reload page with no limit

So there is no possibility run any campaign.
 Comment 2: We do not use our Github environment for support. Please post your questions on our forums at https://forum.revive-adserver.com. If it turns out that there is a bug after all, we'll be glad to revisit it here.
 Comment 3: But this is bug report
 Comment 4: I have added fix but still the same. https://sitelement.cdn.platon.sk/DEMO/TEST.html
 Comment 5: @fh-sitelement both delivery_dev and delivery?
 Comment 6: @fh-sitelement I mean, this is the change that affects the delivery files in the release package:

https://github.com/revive-adserver/revive-adserver/pull/1149/commits/f898324cc9f7ea4ca8305121f368d4d39582b8f5
 Comment 7: It is possibility to have some fix for release 5.0.3 to make it work ?
 Comment 8: 5.0.4 is planned for that purpose very soon.
{'source': 'GithubIssues', 'repo_name_with_owner': 'revive-adserver/revive-adserver', 'issue_id': 550732204, 'repo_stars': 1098.0}