Add system property role.create-application.enabled to control whether anyone can create application or not.

Add system property role.manage-app-master.enabled to control whether any app master can add/delete other app master

Merge pull request #2366 from Diffblue-benchmarks/add-unit-tests-for-com.ctrip.framework.apollo.core.utils.StringUtils

Add unit tests for com.ctrip.framework.apollo.core.utils.StringUtils

fix ldap userId with case problem

These tests were written using Diffblue Cover

docker-compose.yml sample:
------------------------------------------------------------------------------------------
version: '3'
services:
  apollo-portal:
    image: docker.io/xzxiaoshan/apollo-portal:1.4.0
    container_name: apollo-portal
    network_mode: "host"
    environment:
      SERVER_PORT: 5555
      # DataSource Info
      DS_URL: "jdbc:mysql://pro.shanhy.com:3306/ApolloPortalDB?characterEncoding=utf8"
      DS_USERNAME: "shanhy"
      DS_PASSWORD: "xzxiaoshan@123"
      # Environmental variable declaration (meta server url, different environments should have different meta server addresses)
      DEV_META: "http://dev.shanhy.com:6666"
      FAT_META: ""
      UAT_META: ""
      LPT_META: ""
      PRO_META: "http://pro.shanhy.com:6666"
    depends_on:
      - apollo-adminservice
    logging:
      driver: "json-file"
      options:
        max-size: "200k"
        max-file: "10"

  apollo-configservice:
    image: docker.io/xzxiaoshan/apollo-configservice:1.4.0
    container_name: apollo-configservice
    network_mode: "host"
    environment:
      SERVER_PORT: 6666
      # DataSource Info
      DS_URL: "jdbc:mysql://pro.shanhy.com:3306/ApolloPortalDB?characterEncoding=utf8"
      DS_USERNAME: "shanhy"
      DS_PASSWORD: "xzxiaoshan@123"
    logging:
      driver: "json-file"
      options:
        max-size: "200k"
        max-file: "10"

  apollo-adminservice:
    image: docker.io/xzxiaoshan/apollo-adminservice:1.4.0
    container_name: apollo-adminservice
    network_mode: "host"
    environment:
      SERVER_PORT: 6667
      # DataSource Info
      DS_URL: "jdbc:mysql://pro.shanhy.com:3306/ApolloPortalDB?characterEncoding=utf8"
      DS_USERNAME: "shanhy"
      DS_PASSWORD: "xzxiaoshan@123"
    depends_on:
      - apollo-configservice
    logging:
      driver: "json-file"
      options:
        max-size: "200k"
        max-file: "10"

1.将服务端口提取到docker run的 -e SERVER_PORT 可指定，在docker需要使用host网络时，可以不用修改代码指定端口，避免与宿主机上的原有端口占用冲突 (#2333)

2.对docker CMD入口的startup.sh文件，增加可执行授权指令，防止在某些时候该文件被打包进入后没有执行权限的麻烦（已实际遇到，又回头重新打包）

search app from backend instead of loading all app and filter in frontend