AER-2545 - setting TTL via UDF - add record.set_ttl() to the list of record functions in comments.
[LDT] Multiple Changes:
(1) Expose lset config() method
(2) General Code Cleanup
    - Improving or removing trace/debug lines
    - Removing dead code
(3) Code Consolidation
    - Moved common code to ldt_common
(4) Validated Correctness
    - Ensured all sub-records are being properly written after every update
      (Eventually, the sub-record write will be automatic, but until then
       we must force the writes to ensure data persistence.)
Merge branch 'master' of github.com:citrusleaf/aerospike-lua-core
[LDT] Multiple Updates:
(1) Improve Search mechanism in LLIST
(2) Fix Set/Get capacity api calls in LMAP, LSET, LLIST
(3) Improve lstack management of capacity settings
(4) Consolidate individual functions into common utilities
(5) Other various updates/fixes
[LDT Fix] Minor LDT changes for the sake of QAA.
Undoing GIT CHECKING ERROR.
fix overloading issue of map/list object type vs function
LDT Lua:  Multiple Changes:
(1) Fixed LMAP Count bug (AER-2647)
(2) Added support for ldt_exists() in all LDTs (AER-2648)
Merge branch 'master' of github.com:citrusleaf/aerospike-lua-core
AER-2278 - Key storage - add a record operations Lua file to our external collection, providing easy access to a simple drop_key() function.