ZEPPELIN-121 Fix handling escpae char in erb evaluator
ZEPPELIN-122 prevent add resource more than twice in a same connection
Merge pull request #71 from NFLabs/fix_escape_char_parsing

ZEPPELIN-121 Fix handling escpae char in erb evaluator
ZEPPELIN-122 change map to set
Merge pull request #72 from NFLabs/fix_hive_add_resource

ZEPPELIN-122 prevent add resource more than twice in a same connection