[core] Updating documentation

Adding a checkconfig for Hive warehouse.
Adding new tours.
Re-wording tour welcome message.
HUE-1978 [beeswax] Cancel whole multi query execution
HUE-1918 [core] Login page should accept longer password
HUE-2008 [pig] Clicking on the stop button should stop on the frontend

Added $.post fail handler
Moved New script label
HUE-2013 [metastore] Write permission instead of read permission

Remove read permission in a data migration.
[core] Update configuration check path color

Changed from red to Hue blue
[useradmin] Hide LDAP sync buttons when LDAP is not configured
HUE-1884 [core] Limit number of history documents
HUE-1884 [core] Split tag view in shared and not shared ones

Split into My Projects and Shared with me on the UI
Added 'Shared by' on shared tags
[hbase] A couple of bug fixes
[core] Fix several broken and hanging tests

Fix metastore tests that were out of sync
Disable dynamic fields
Change port of Oozie test server has it is conflicting with Spark master.
Move config_validator dependencies into the function to avoid conflicts.
Merge remote-tracking branch 'remotes/origin/testing' into testing