参考：http://www-01.ibm.com/support/knowledgecenter/api/content/SSEQTP_8.5.5/com.ibm.websphere.wlp.doc/ae/twlp_dep_war.html?locale=en
Liberty中应用的contextroot决定于以下几个地方指定的值
The context-root attribute specifies the entry point of the deployed application. The entry point of a deployed application is determined in the following precedence:
- context-root in the server.xml file
- application.xml, if an EAR application
- ibm-web-ext.xml, if a web application
- name of the application in the server.xml file, if a web application
- Manifest.MF, if a WAB application
- Directory name or the file name relative to the "dropins" directory of the Liberty profile