use module.get_bin_path() for a2enmod

library/web_infrastructure/apache2_module

@@ -45,7 +45,8 @@ EXAMPLES = '''
 
 def _module_is_enabled(module):
     name = module.params['name']
-    result, stdout, stderr = module.run_command("a2enmod -q %s" % name)
+    a2enmod_binary = module.get_bin_path("a2enmod")
+    result, stdout, stderr = module.run_command("%s -q %s" % (a2enmod_binary, name))
     return result == 0
 
 def _module_is_disabled(module):
@@ -69,7 +70,8 @@ def _enable_module(module):
     if _module_is_enabled(module):
         module.exit_json(changed = False, result = "Success")
 
-    result, stdout, stderr = module.run_command("a2enmod %s" % name)
+    a2enmod_binary = module.get_bin_path("a2enmod")
+    result, stdout, stderr = module.run_command("%s %s" % (a2enmod_binary, name))
     if result != 0: 
         module.fail_json(msg="Failed to enable module %s: %s" % (name, stdout))