[Scala][Lagom] rename generator from scala-lagom to scala-lagom-server (#7014)

* rename scala-lagom to scala-lagom-server

* add back pom.xml and shell script

* update scala-lagom-server path in circleci pom.xml

* make shell script executable

* rename batch file

bin/scala-lagom-server-petstore.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+SCRIPT="$0"
+
+while [ -h "$SCRIPT" ] ; do
+  ls=`ls -ld "$SCRIPT"`
+  link=`expr "$ls" : '.*-> \(.*\)$'`
+  if expr "$link" : '/.*' > /dev/null; then
+    SCRIPT="$link"
+  else
+    SCRIPT=`dirname "$SCRIPT"`/"$link"
+  fi
+done
+
+if [ ! -d "${APP_DIR}" ]; then
+  APP_DIR=`dirname "$SCRIPT"`/..
+  APP_DIR=`cd "${APP_DIR}"; pwd`
+fi
+
+executable="./modules/swagger-codegen-cli/target/swagger-codegen-cli.jar"
+
+if [ ! -f "$executable" ]
+then
+  mvn clean package
+fi
+
+# if you've executed sbt assembly previously it will use that instead.
+export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
+ags="$@ generate -t modules/swagger-codegen/src/main/resources/scala-lagom-server -i modules/swagger-codegen/src/test/resources/2_0/petstore.yaml -l scala-lagom-server -o samples/server/petstore/scala-lagom-server"
+
+java $JAVA_OPTS -jar $executable $ags