[COOK-3565] Add connectors maxThreads param to the server.xml template

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
Version bump to v0.15.0
Version bump to v0.15.1
[COOK-3379] Only generate keystore and restart when sources change

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
[COOK-3622] Add Amazon Linux support

Signed-off-by: Seth Vargo <sethvargo@gmail.com>