Ignore automatically module-info.class when maxJdkVersion < 1.9

[Vlatombe]

Context: #46, #36, #75

Fix from #36 would cause unnecessary noise such as

[WARNING] Invalid bytecodeVersion for module-info.class: expected 52, but was 53
[WARNING] Invalid bytecodeVersion for module-info.class: expected 52, but was 53
[WARNING] Invalid bytecodeVersion for module-info.class: expected 52, but was 53
[WARNING] Invalid bytecodeVersion for module-info.class: expected 52, but was 53
[WARNING] Invalid bytecodeVersion for module-info.class: expected 52, but was 53
[WARNING] Invalid bytecodeVersion for module-info.class: expected 52, but was 53
[WARNING] Invalid bytecodeVersion for module-info.class: expected 52, but was 53

This supercedes #75.

This fix takes a different approach: when maxJdkVersion < 1.9, module-info is just ignored automatically.

[batmat]

LGTM

[batmat]

released as 1.2 in staging, vote in progress since a few minutes ago.

Will publish to Central in 72 hours w/o pushback.

[batmat]

https://groups.google.com/d/msg/mojohaus-dev/SiqIDHtDnuc/1RvKfpbYBwAJ

[Vlatombe]

Cool, thanks @batmat