Add default value for variable 'dynatrace_wsagent_linux_installer_file_url'.
Add default value for variable 'dynatrace_wsagent_linux_installer_file_url'.

tobybro/Dynatrace-WebServer-Agent-Ansible,dynaTrace/Dynatrace-WebServer-Agent-Ansible,tobybro/Dynatrace-WebServer-Agent-Ansible,dynaTrace/Dynatrace-WebServer-Agent-Ansible