Android:
 - refactoring

Server:
 - refactoring
org.jetbrains annotations replaced by com.google.code.findbugs
android-maven-plugin version -> 3.7.0
Migration:
 - Java 1.6 -> Java 1.8 (sever side)
 - JBoss 7.1 (JavaEE6) -> WildFly 8.1.0.Final (JavaEE7)

Server:
 - workaround for WFLY-3221