Tomcat 8.5.41 / 9.0.20 version update

Fix error due to missing quotes

Merge pull request #18 from shrishrirang/11

Add Java 11 support

Minor changes to publishStage2.ps1

Minor path change to the publishing script

Change base image from ubuntu to alpine

- Changed the base image from ubuntu to alpine. Made corresponding changes to Dockerfile and init_container.sh
- Base image will now be pulled from Microsoft Container Registry
- Updated catalina.properties to match the version of Tomcat that's being used in the Dockerfiles

Scripts to publish the image

- publishToTestAccount.ps1 publishes to appsvctest
- publishToOfficialAccount.ps1 publishes the specified image from appsvctest to appsvc.

Sample usage:
.\publishToTestAccount.ps1
.\publishToOfficialAccount.ps1 180912111221

Add time taken for a request in Tomcat's access log