Revert "branch v2.15"

This reverts commit c7c2585f96.

tests/ft/plugin/test_plugin.py

@@ -244,7 +244,7 @@ class TestPlugin:
         assert 200 == response.status_code
         for plugin in response.json().get("plugins"):
             if plugin['name'] == 'c1':
-                assert plugin['version'] == '2.15.99'
+                assert plugin['version'] == '2.14.99'
 
     @description(given="incorrect configuration", when="update plugin", then="fail")
     def test_10_update_plugin_fail3(self):

tests/plugins/c1/c1_2.c

@@ -63,7 +63,7 @@ static const neu_plugin_intf_funs_t plugin_intf_funs = {
 };
 
 const neu_plugin_module_t neu_plugin_module = {
-    .version         = NEU_VERSION(2, 15, 99),
+    .version         = NEU_VERSION(2, 14, 99),
     .schema          = "c1",
     .module_name     = "c1",
     .module_descr    = "c1 v2",