HIVE-7033 : grant statements should check if the role exists (Thejas Nair via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1594259 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6187 : Add test to verify that DESCRIBE TABLE works with quoted table names (Carl Steinbach via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1594261 13f79535-47bb-0310-9956-ffa450edef68