Create properties template and remove driver binaries

[labkey-tchad]

Rationale

test.properties doesn't give any guidance regarding how to use it. It also ends up in changelists because people often edit it. This removes test.properties from source control and replaces it with test.properties.dist. The gradle plugin will generate test.properties if it is missing.
The chromedriver and geckodriver binaries checked in are out of date. It is bad practice to commit binaries to source control anyway so we will remove them and require folks to install them manually to run tests.

Related Pull Requests

• Support test properties template gradlePlugin#133

Changes

• Remove chromedriver/geckodriver binaries
• Remove test.properties from source control and add to .gitignore
• Add annotated test.properties.template
• Generate test.properties from test.properties.template

[labkey-chrisj]

A little manual testing on my part says the only missing thing is documentation calling out the existence of the gradle command to create test.properties from its template: gradlew :server:testAutomation:initProperties