(maint) travis: Use path expansion to find jdk11 (#2807)
(maint) travis: Use path expansion to find jdk11 (#2807)

* (maint) travis: Use path expansion to find jdk11

Previously this was a hardcoded value, but the path can change if they
change the formula we are using from the adoptopenjdk tap. This uses
path expansion to find the path regardless of changes upstream of us.

adding brew update

removing brew cache

puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb