Upgrade Weld-related modules to JBoss Modules 1.8

Once JBoss Modules 1.8+ hit WFLY (meaning when core gets upgraded to 5.0.0.Alpha3 or newer) we should update all weld-related modules to use this version and change the dependencies to the JDK 9+ style (for instance replacing javax.api dep with various standard modules).

For more info, see original proposal.
Or check this email on JBoss modules 1.8 features.