pa-test: Don't do a full clean during tests
pa-test: Don't do a full clean during tests

After test_installer, we want to clean the dist directory so we ensure
we have the offline installer. HOWEVER, we cannot do a full clean because
that deletes the test directories and eggs and everything.

prestodb/presto-admin,Svjard/presto-admin,prestodb/presto-admin,Svjard/presto-admin