Unit tests for some WMF extensions (2nd pass)

Add unittests to several extensions present in the mw/core wmf branch.
Also moved WikimediaEvents around for sorting purposes.

Follow up previous commit cb05c17a4

ConfirmEdit
InputBox
Insider
intersection
LandingCheck
LdapAuthentication
LiquidThreads
Listings
LocalisationUpdate
MapSources
MarkAsHelpful
MoodBar
MwEmbedSupport
MWSearch
NavigationTiming
NewUserMessage
Nostalgia
Nuke
OAI
OATHAuth
OpenSearchXml
PageImages
PdfHandler
Quiz
RandomRootPage
RelatedArticles
RelatedSites
Renameuser
RSS
Score
SearchExtraNS
SecurePoll
SemanticForms
SemanticMediaWiki
SemanticResultFormats
ShortUrl
SiteMatrix
Solarium
SpamBlacklist
StrategyWiki
SubPageList3
SubpageSortkey
SwiftCloudFiles
TemplateSandbox
TitleKey
TocTree
TorBlock
TrustedXFF
UnicodeConverter
UserDailyContribs
UserMerge
WikiLove
WikimediaEvents
WikimediaIncubator
WikimediaMaintenance
WikimediaMessages
WikimediaShopLink

Change-Id: Ieeffc11ba0bb9bf7fcdac1121981dcddba774184