Correct install.data_dir argument value.

application/src/main/conf/thingsboard.conf

@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-export JAVA_OPTS="$JAVA_OPTS -Dplatform=@pkg.platform@ -Dinstall.data_dir=@pkg.installFolder@"
+export JAVA_OPTS="$JAVA_OPTS -Dplatform=@pkg.platform@ -Dinstall.data_dir=@pkg.installFolder@/data"
 export LOG_FILENAME=${pkg.name}.out
 export LOADER_PATH=${pkg.installFolder}/conf,${pkg.installFolder}/extensions
 export SQL_DATA_FOLDER=${pkg.installFolder}/data/sql

application/src/main/scripts/windows/service.xml

@@ -9,6 +9,7 @@
     <env name="SQL_DATA_FOLDER" value="%BASE%\data\sql" />
     <executable>java</executable>
     <startargument>-Dplatform=windows</startargument>
+    <startargument>-Dinstall.data_dir=%BASE%\data</startargument>
     <startargument>-jar</startargument>
     <startargument>%BASE%\lib\${pkg.name}.jar</startargument>
 </service>