Bug 515946 - Cleanup o.e.tests.resources

While working on other things I noticed the following in the log:
[WARNING] The effective compiler target level 1.8 is incompatible with
the following OSGi execution environments: [JavaSE-1.7 (assumes 1.7)]

So this patch movs the BREE to Java 1.8, remove the
jre.compilation.profile, use lambdas all over the place and fix other
warnings.

Change-Id: Ib6f01ca01b368b3713da881e56fb0e9139fbc89c
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>