fix when the system does not have lsb_release script, but has /etc/lsb_release file

library/system/setup

@@ -376,8 +376,7 @@ class Facts(object):
 
     def get_lsb_facts(self):
         lsb_path = module.get_bin_path('lsb_release')
-        if lsb_path is None:
-            return self.facts
+        if lsb_path:
             rc, out, err = module.run_command([lsb_path, "-a"])
             if rc == 0:
                 self.facts['lsb'] = {}
@@ -397,6 +396,25 @@ class Facts(object):
                     self.facts['lsb']['codename'] = value
             if 'lsb' in self.facts and 'release' in self.facts['lsb']:
                 self.facts['lsb']['major_release'] = self.facts['lsb']['release'].split('.')[0]
+        elif lsb_path is None and os.path.exists('/etc/lsb-release'):
+            self.facts['lsb'] = {}
+            with open('/etc/lsb-release', 'r') as f:
+                for line in f.readlines():
+                    value = line.split('=',1)[1].strip()
+                    if 'DISTRIB_ID' in line:
+                        self.facts['lsb']['id'] = value
+                    elif 'DISTRIB_RELEASE' in line:
+                        self.facts['lsb']['release'] = value
+                    elif 'DISTRIB_DESCRIPTION' in line:
+                        self.facts['lsb']['description'] = value
+                    elif 'DISTRIB_CODENAME' in line:
+                        self.facts['lsb']['codename'] = value
+        else:
+            return self.facts
+
+        if 'lsb' in self.facts and 'release' in self.facts['lsb']:
+            self.facts['lsb']['major_release'] = self.facts['lsb']['release'].split('.')[0]
+
 
     def get_selinux_facts(self):
         if not HAVE_SELINUX: