Java version of integration tests properly set

Change-Id: Ic527c6f0579f73de61ceb2a6c2561e58a2fad2ac
Tested-by: Mr. Jenkins
Reviewed-by: Sławek Piotrowski <sentinel@atteo.com>
Eclipse JDT compiler throws IOException, not FileNotFoundException

Change-Id: I233d11dfe69c131ab369e73cba302d3825d41b1d
Fixes: #3
Tested-by: Mr. Jenkins
Reviewed-by: Tomek Piotrowski <tomek.piotrowski@atteo.com>
Set compiler version in integration tests parent

Change-Id: If0a256921c557494499c51b62e4094b1d89d5a8e
Tested-by: Mr. Jenkins
Reviewed-by: Tomek Piotrowski <tomek.piotrowski@atteo.com>
Update README

Change-Id: Ieca205d8b5e41d4f1aeb67ac8325b8a44a88874c