INSTALL - Enhance and complete Test Case to validate installation

[neooblaster]

• https://help.sap.com/doc/saphelp_nw75/7.5.5/en-US/4e/c487046e391014adc9fffe4e204223/content.htm?no_cache=true
• https://help.sap.com/doc/saphelp_nw74/7.4.16/en-US/83/0c8c04837e46c3bab1d1d94fef0d13/content.htm?no_cache=true
• https://help.sap.com/doc/saphelp_nw74/7.4.16/en-US/3c/3bf5ec892f4e01b118aec4c24723f0/content.htm?no_cache=true