JSON Reorganising

Splits  json/constants.json into  multiple smaller
json files. This will make  it easier to maintain,
add, modify json records going forwards.

 On branch master

 Changes to be committed:
	modified:   Ltt/Json.pm
	new file:   json/abbreviations_key.json
	new file:   json/capacity_groups.json
	new file:   json/capacity_groups_contrib.json
	modified:   json/constants.json
	new file:   json/grouped_hbar_by_contrib_configs.json
	new file:   json/grouped_hbar_by_count_configs.json
	new file:   json/hbar_graph_configs.json
	new file:   json/hbar_hdd_cap_by_size_configs.json
	new file:   json/hbar_hdd_count_by_size_configs.json
	new file:   json/json_files_record.json
	new file:   json/os_abbr_key.json
	new file:   json/pie_chart_configs.json
	new file:   json/vendor_list.json
	modified:   ltt-rankings.pl
	modified:   ltt-rankings.txt