Revert "Update Vaadin and Spring Boot version"

This reverts commit 7555cfd51d.

kontor-spring/gradlew.bat

@@ -13,8 +13,6 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
-@rem SPDX-License-Identifier: Apache-2.0
-@rem
 
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
@@ -23,8 +21,8 @@
 @rem
 @rem ##########################################################################
 
-@rem Set local scope for the variables, and ensure extensions are enabled
-setlocal EnableExtensions
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
@@ -51,7 +49,7 @@ echo. 1>&2
 echo Please set the JAVA_HOME variable in your environment to match the 1>&2
 echo location of your Java installation. 1>&2
 
-"%COMSPEC%" /c exit 1
+goto fail
 
 :findJavaFromJavaHome
 set JAVA_HOME=%JAVA_HOME:"=%
@@ -65,18 +63,30 @@ echo. 1>&2
 echo Please set the JAVA_HOME variable in your environment to match the 1>&2
 echo location of your Java installation. 1>&2
 
-"%COMSPEC%" /c exit 1
+goto fail
 
 :execute
 @rem Setup the command line
 
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 
 @rem Execute Gradle
-@rem endlocal doesn't take effect until after the line is parsed and variables are expanded
-@rem which allows us to clear the local environment before executing the java command
-endlocal & "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %* & call :exitWithErrorLevel
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
-:exitWithErrorLevel
-@rem Use "%COMSPEC%" /c exit to allow operators to work properly in scripts
-"%COMSPEC%" /c exit %ERRORLEVEL%
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega