runtime-lite has not been added as maven module

[lachlan-roberts]

runtime-lite has not been added as a maven module and so it won't build with the rest of the project.

It needs an entry in the <modules> section of runtime/pom.xml, but when added it gives some compile errors

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.11.0:testCompile (default-testCompile) on project runtime-lite: Compilation failure: Compilation failure: 
[ERROR] appengine-java-standard/runtime/lite/src/test/java/com/google/appengine/runtime/lite/RequestManagerTest.java:[295,63] cannot find symbol
[ERROR]   symbol:   method getGeneratedRegistry()
[ERROR]   location: class com.google.protobuf.ExtensionRegistry
[ERROR] appengine-java-standard/runtime/lite/src/test/java/com/google/appengine/runtime/lite/RequestManagerTest.java:[334,63] cannot find symbol
[ERROR]   symbol:   method getGeneratedRegistry()
[ERROR]   location: class com.google.protobuf.ExtensionRegistry
[ERROR] -> [Help 1]

[lachlan-roberts]

I don't think this was actually resolved.

Although it does look like the compile errors were addressed in that commit.

[ludoch]

Be careful with this new module as the way it can be used publicly is tricky (completely different boot process, no app class loader, no jsp support, no static files, etc, and expectation of a big fatjar at the end with the app to execute the app). Before pushing to maven central, we need to think