HIVE-4802 : Fix url check for missing / or /<db> after hostname in jdb uri (Thejas Nair via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1500781 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-ANT-REFACTORED-plus-GEN-TESTS-SPLIT-trunk-gd