Better FreeBSD distribution facts (#15866)

* - Give more usable content to distribution_version and set distribution_major_version

* Make python 2.4 friendly

lib/ansible/module_utils/facts.py

@@ -675,7 +675,7 @@ class Distribution(object):
         self.facts['distribution_release'] = platform.release()
         self.facts['distribution_version'] = platform.version()
 
-        systems_implemented = ('AIX', 'HP-UX', 'Darwin', 'OpenBSD')
+        systems_implemented = ('AIX', 'HP-UX', 'Darwin', 'FreeBSD', 'OpenBSD')
 
         self.facts['distribution'] = self.system
 
@@ -764,6 +764,13 @@ class Distribution(object):
         data = out.split()[-1]
         self.facts['distribution_version'] = data
 
+    def get_distribution_FreeBSD(self):
+        self.facts['distribution_release'] = platform.release()
+        data = re.search('(\d+)\.(\d+)-RELEASE.*', self.facts['distribution_release'])
+        if data:
+            self.facts['distribution_major_version'] = data.group(1)
+            self.facts['distribution_version'] = '%s.%s' % (data.group(1), data.group(2))
+
     def get_distribution_OpenBSD(self):
         rc, out, err = self.module.run_command("/sbin/sysctl -n kern.version")
         match = re.match('OpenBSD\s[0-9]+.[0-9]+-(\S+)\s.*', out)