SP-1324 - Backport of ANALYZER-1961 - Displaying Geo Maps in HTTPS/SSL configured BI Server results in mixed content and errors in Analyzer (5.1)

add SERVER_PROTOCOL global variable
Merge pull request #1669 from aliakseihaidukou/SP-1324

SP-1324 - Backport of ANALYZER-1961 - Displaying Geo Maps in HTTPS/SSL c...