Fix findbug file path

[Max-Levitskiy]

We can't run a maven build anywhere except trust-back folder because of a fixed path to a findbugs-exclude.xml file
https://stackoverflow.com/questions/4036229/findbugs-maven-plugin-findbugs-exclude-with-multiple-projects - here can be a solution. Need to extract this file in a separate project, publish it is the artifactory and unpack it before running the findbug task.