[Hawkular-dev] Travis cache pruning

[Peter Palaga]

Hi *,

because we had no cache pruning in place, the cached ~/.m2/repository in 
hk main became too bing. As a consequence of that, when Travis attempted 
to zip the cached folder, the cache archive made the disk full and not 
only that the cache could not be uploaded outside of the transient 
docker container, also all subsequent tasks (deployment of SNAPSHOTs) 
failed.

I could not find a working pruning script quickly enough. To solve the 
problem temporarily at least, I deleted the cache manually under 
https://travis-ci.org/hawkular/hawkular/caches

Best,

Peter