Choose between "stats" and "statistics" in v3 api

[davidyuk]

"stats" use cases:

ae_mdw/docs/swagger_v3/stats.spec.yaml

Lines 167 to 171 in f7cc3fa

	/deltastats:
	get:
	deprecated: false
	description: Get delta stats.
	operationId: GetDeltastats

ae_mdw/docs/swagger_v3/stats.spec.yaml

Lines 196 to 200 in f7cc3fa

	/totalstats:
	get:
	deprecated: false
	description: Get total accumulated stats.
	operationId: GetTotalstats

ae_mdw/docs/swagger_v3/stats.spec.yaml

Lines 225 to 229 in f7cc3fa

	/minerstats:
	get:
	deprecated: false
	description: Get miners list with total rewards obtained through mining.
	operationId: GetMinerstats

"statistics" use cases:

ae_mdw/docs/swagger_v3/stats.spec.yaml

Lines 136 to 148 in f7cc3fa

	Statistic:
	type: object
	description: Statistic
	properties:
	count:
	description: The statistic count
	type: integer
	start_date:
	description: The statistic start date
	type: string
	end_date:
	description: The statistic end date (not taken into account)
	type: string

ae_mdw/docs/swagger_v3/stats.spec.yaml

Lines 253 to 260 in f7cc3fa

	/statistics/blocks:
	get:
	deprecated: false
	description: Get total blocks count statistics.
	operationId: GetBlocksStatistics
	parameters:
	- name: interval_by
	description: The interval in which to return the statistics.

ae_mdw/docs/swagger_v3/stats.spec.yaml

Lines 316 to 323 in f7cc3fa

	/statistics/transactions:
	get:
	deprecated: false
	description: Get total transactions count statistics.
	operationId: GetTransactionsStatistics
	parameters:
	- name: interval_by
	description: The interval in which to return the statistics.

ae_mdw/docs/swagger_v3/stats.spec.yaml

Lines 376 to 383 in f7cc3fa

	/statistics/names:
	get:
	deprecated: false
	description: Get total names count statistics.
	operationId: GetNamesStatistics
	parameters:
	- name: interval_by
	description: The interval in which to return the statistics.