Wizards: Fix validation of C++ class names

Task-number: QTCREATORBUG-15647
Change-Id: I265a7dbadb2f87e7e44a1770be2af3eb9b9cb53b
Reviewed-by: Alessandro Portale <alessandro.portale@theqtcompany.com>

share/qtcreator/templates/wizards/classes/cpp/wizard.json

@@ -34,7 +34,7 @@
                     "trDisplayName": "Class name:",
                     "mandatory": true,
                     "type": "LineEdit",
-                    "data": { "validator": "(?:(?:[a-zA-Z_][a-zA-Z_0-9]*::)+[a-zA-Z_][a-zA-Z_0-9]*|)" }
+                    "data": { "validator": "(?:(?:[a-zA-Z_][a-zA-Z_0-9]*::)*[a-zA-Z_][a-zA-Z_0-9]*|)" }
                 },
                 {
                     "name": "BaseCB",

share/qtcreator/templates/wizards/classes/itemmodel/wizard.json

@@ -31,7 +31,7 @@
                     "trDisplayName": "Class name:",
                     "mandatory": true,
                     "type": "LineEdit",
-                    "data": { "validator": "(?:(?:[a-zA-Z_][a-zA-Z_0-9]*::)+[a-zA-Z_][a-zA-Z_0-9]*|)" }
+                    "data": { "validator": "(?:(?:[a-zA-Z_][a-zA-Z_0-9]*::)*[a-zA-Z_][a-zA-Z_0-9]*|)" }
                 },
                 {
                     "name": "Base",