CLDR-18827 Make cldr-apps-webdriver a main app, not a test

[btangmu]

-Remove AppTest.java

-Move other java files from test to main

-Update Dockerfile, README.md, and pom.xml

-Avoid some NullPointerExceptions in SurveyDriverCredentials.java if properties are not defined, by checking for null before calling toString

-Define PROPS_TIME_OUT_SECONDS_KEY consistently with other keys

-Change the name cldr-apps-webdriver to CLDR Apps Webdriver, for consistency with cldr-apps, cldr-code

-Fix comment for location of surveydriver.properties, now expected directly inside cldr-apps-webdriver directory

-Add skipIfEmpty for maven-jar-plugin, maven-install-plugin, and maven-deploy-plugin

CLDR-18827

• [ ] This PR completes the ticket.

ALLOW_MANY_COMMITS=true

[srl295]

this should be discussed and go under CLDR-18827

[btangmu]

This is outdated; changed to draft, maybe still useful for reference