CB-14101 Fix Java version check for Java >= 9

[raphinesse]

Platforms affected

Android

What does this PR do?

• Fix Java version check for Java >= 9
• Checks that we have exactly Java 1.8 since nothing else works with the Android SDK
• Tell the user that we need exactly Java 1.8 if we can't find it

What testing has been done on this change?

The relevant function was not covered by unit tests to begin with, so I only tested this manually with the following code:

Promise.resolve(
  require('./bin/templates/cordova/lib/check_reqs').check_java()
).then(console.log)

Output for Java 8 is 1.8.0, for Java 10 is 10.0.1.

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.

Added automated test coverage as appropriate for this change

[raphinesse]

I actually wanted to use semver for this, but with the dependency bundling it was too much of a hassle.

[raphinesse]

Added node 4 compatibility so we can release this in a patch release

[codecov-io]

Codecov Report

Merging #446 into master will increase coverage by 0.04%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #446      +/-   ##
==========================================
+ Coverage   44.16%   44.21%   +0.04%     
==========================================
  Files          17       17              
  Lines        1698     1694       -4     
  Branches      314      312       -2     
==========================================
- Hits          750      749       -1     
+ Misses        948      945       -3

Impacted Files	Coverage Δ
bin/templates/cordova/lib/check_reqs.js	48.57% <0%> (+0.44%)	⬆️

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[raphinesse]

Actually, there's a bug 🤕

[raphinesse]

Now it should be fine. Test coverage is a great thing 😅