HUE-1743 [core] Prevent frame busting and clickjacking

Added to the login page too
HUE-1715 [dbquery] test using sqlite
HUE-1727 [beeswax] Export data from a non default database

Adding a USE in case another concurrent query with another DB
is executed. Implementation will then depend on Hive.

Renamed HiveServer2Dbms
HUE-1601 [oozie] Workflow editor shouldn't display deleted action in Import Action

Filter out workflows from Spark app
Fix race condition when installing all examples for the first time
Remove history scripts from default tag
HUE-1744 [core] upgrade packaged thrift

Thrift 0.9.1 inclusion.
Thrift 0.9.1 uses TCP/IP v6 by default.
Updated thrift_util_test.py to use TCP/IP v6.
HUE-1739 [dbquery] 500 error on execute query

- Use %Y-%m-%d %H:%M:%S %Z as date time format.
HUE-1748 [jobsub] Datatables does not resize correctly

Disabled autowidth set from Datatables
HUE-1728 [search] Error or disabled message when cannot connect to the Solr server

Improved error messages
Improved empty results message
HUE-1704 [pig] Give the user the possibility to hide the function helper and totalstorage it

Added 'hide this' functionality to the Pig navigator
HUE-1745 [beeswax] Autocomplete table name with magic from broken

Changed substring because of new font awesome names
HUE-1750 [core] Make IPv4 or IPv6 pluggable for Thrift clients

Update thrift lib to use configurable socket family.
Update thrift utils tests to use IPv4.
HUE-1750 [core] Make IPv4 or IPv6 pluggable for Thrift clients

Spelling error in TSocket.py
HUE-1746 [metastore] Read header from file

Currently the header is not truncated. Will be added separately.
Current tests are good, this is mostly front end.
HUE-1746 [metastore] Styled the header button
HUE-1665 [oozie] import workflow locks database

Depth first search with large workflows locks Hue up.
Saving subgraphs remedies this.
HUE-1747 [metastore] Create table from quoted csv file

Make a test independent of the Yarn ports
[beeswax] Dynamic HiveServer2 port during testing
[core] Make hostname generic in tests and remove webhdfs threadness test
Merge remote-tracking branch 'origin/testing' into testing