fix travis-ci scripts

[XenoAmess]

No description provided.

[coveralls]

Coverage increased (+0.1%) to 93.976% when pulling 17d0ecd on XenoAmess:patch-1 into 00c22c3 on apache:master.

[adamretter]

I wonder if we need both openjdk11 and oraclejdk11 ?

[XenoAmess]

I wonder if we need both openjdk11 and oraclejdk11 ?

I thought there must be a reason to contain both in original travis-ci scripts, so I didn't remove any of them.

[aherbert]

Can you drop:

openjdk12
openjdk13
oraclejdk11

Now Java 14 is out 12 and 13 are redundant. Testing on oraclejdk11 and openjdk11 also seems redundant.

[XenoAmess]

Now Java 14 is out 12 and 13 are redundant. Testing on oraclejdk11 and openjdk11 also seems redundant.

we can drop 12 but 13 but I think we'd better remain 11, as 11 is LTS.

[aherbert]

My point was that testing on both oraclejdk11 and openjdk11 seems redundant. I would also drop oraclejdk11 and just leave openjdk11.

[XenoAmess]

My point was that testing on both oraclejdk11 and openjdk11 seems redundant. I would also drop oraclejdk11 and just leave openjdk11.

@aherbert oh, got it:)