HUE-207 [beeswax] Leverage tablib to enable more flexible data export from Beeswax
HUE-1826 [impala] Download or export query result

Number of initial rows of a result set to ask Impala to cache in order
to support re-fetching them for downloading them.
Set to -1 for disabling the option and backward compatibility.
HUE-1927 [beeswax] Loading a query history of a saved query does not load its name
HUE-207 [core] upgrade tablib to development version
HUE-1784 [oozie] False positive variable when submit from HDFS

Simple variable names like $var were only valid in Hue 2. It was a Hue
thing, Oozie only supports ${var} parameters.
To be more consistent only the curly bracket form is valid, e.g.: ${var}
Renamed test files to *_tests.py