Linkage Monitor to work with repositories that hosts other BOMs than google-cloud-bom #1156
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Fixes #1154 .
Problem to solve
Before this PR, Linkage Monitor does not check the updated BOM in a repository. Suppose Linkage Monitor is setup for https://github.com/googleapis/google-auth-library-java. It ignores any new change in the google-auth-library-bom.
How to solve
Maven's model builder provides API
modelRequest.setModelResolver(ModelResolver modelResolver), where we can intercept model resolution. This PR leverages the API by introducingVersionSubstitutingModelResolverwhich substitutes the versions of specified Maven coordinates.