Support for tier calculation annotations

FEATURES:
MET-1928: Tier calculation during indexing
MET-1988: Tier calculation improvements
MET-2008: Tier annotations serialization during indexing
MET-1983: make resource download connect/socket timeouts configurable
MET-1867: Upgrade mongo, redisson library versions
MET-1982: Processor pool for media extractors and link processors
MET-1833: Upgrade postgresql, hibernate, rabbitmq libraries
MET-2009: URL of source link added in Link Checking library exceptions
MET-2021: Link checking step can also occur after any other plugin
MET-1985: Update schema files
MET-2050: Attempt to solve some high rated vulnerabilities for technical debt
MET-2032: Change dereferenceable fields
MET-2042: Default Xslt is automatically inserted in db for new installations
Better error message in media processing for audio/video files
Upgrade xstream, jackson library version

BUGS:
MET-1676: Add missing dependencies to media service code
MET-1949: Media processor bug resolving and optimization
MET-1952: Catch any potential throwable inside consumer to ensure ack is sent
MET-1981: Fix erroneous way of getting owner element of attribute
MET-2002: Be more flexible for null list for objects in metadata cache
MET-2030: Stop considering isShownAt resources as full text for Solr
MET-2007: Fake facets and has_media only for isShownBy and hasView
MET-2102, MET-2099, MET-2045: Fixes for media tiers
MET-2110: Update indexing to accept application/xhtml as text
Small fix to prevent null pointer exception in reprocessing script