used package name instead of hardcoded for windows packaging

packaging/java/scripts/windows/install.bat

@@ -23,7 +23,7 @@ if "%1" == "--loadDemo" (
 SET BASE=%~dp0
 SET LOADER_PATH=%BASE%\conf,%BASE%\extensions
 SET SQL_DATA_FOLDER=%BASE%\data\sql
-SET jarfile=%BASE%\lib\thingsboard.jar
+SET jarfile=%BASE%\lib\${pkg.name}.jar
 SET installDir=%BASE%\data
 
 PUSHD "%BASE%\conf"

packaging/java/scripts/windows/install_dev_db.bat

@@ -5,7 +5,7 @@ setlocal ENABLEEXTENSIONS
 SET BASE=${project.basedir}\target
 SET LOADER_PATH=%BASE%\conf,%BASE%\extensions
 
-SET jarfile=%BASE%\thingsboard-${project.version}-boot.jar
+SET jarfile=%BASE%\${pkg.name}-${project.version}-boot.jar
 SET installDir=%BASE%\data
 SET loadDemo=true