drop repackage from integration tests root pom

[wind57]

No description provided.

[wind57]

@ryanjbaxter minor simplification, thank you

[ryanjbaxter]

Did you get an understanding of why this was here in the first place?

[wind57]

the truth is that I added it there, and from what I recall I was trying at the time to move the spring-boot-maven-plugin to the root pom of the integration tests. That was not working smoothly as I wanted it to be, initially, so I was trying many things, adding this part (that I now have removed), was one of the tests, that should have not been there in the first place.