* Small code adjustments to make more reliable when wst installed.
* Configure target platform for running tests with tycho.
* Synchronize compiler setting to allow not exluding warnings in tycho
build.

Change-Id: I8e4d00528ea014a5a14c18b850e165b5230f56de
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>