Change oscapd shebang from python2 to python
Change oscapd shebang from python2 to python

I am improving python3 compatibility, so daemon should be
able to run on both (2/3) python versions.

pthierry38/openscap-daemon,OpenSCAP/openscap-daemon,baude/openscap-daemon,baude/openscap-daemon,pthierry38/openscap-daemon,OpenSCAP/openscap-daemon