Support Venice Primitive keys

[jogrogan]

• Support Primitive Venice Keys
• Add Template option for empty string defaults
• Add template & key option testing

Global templates were causing problems with keys getting overwritten, see example below:

Without change:

0: Hoptimator> !pipeline insert into "VENICE-CLUSTER0"."test-store" ("KEY$id", "intField") select "KEY", "intField" from "VENICE-CLUSTER0"."test-store-primitive"
CREATE TABLE IF NOT EXISTS `test-store-primitive` (`intField` INTEGER, `stringField` VARCHAR, `KEY` INTEGER) WITH ('connector'='venice', 'key.fields'='KEY_id', 'key.fields-prefix'='KEY_', 'key.type'='RECORD', 'partial-update-mode'='true', 'storeName'='test-store-primitive', 'value.fields-include'='EXCEPT_KEY');
CREATE TABLE IF NOT EXISTS `test-store` (`intField` INTEGER, `stringField` VARCHAR, `KEY_id` INTEGER) WITH ('connector'='venice', 'key.fields'='KEY_id', 'key.fields-prefix'='KEY_', 'key.type'='RECORD', 'partial-update-mode'='true', 'storeName'='test-store', 'value.fields-include'='EXCEPT_KEY');
INSERT INTO `test-store` (`intField`, `KEY_id`) SELECT `intField`, `KEY` AS `KEY_id` FROM `VENICE-CLUSTER0`.`test-store-primitive`;

With change:

0: Hoptimator> !pipeline insert into "VENICE-CLUSTER0"."test-store" ("KEY$id", "intField") select "KEY", "intField" from "VENICE-CLUSTER0"."test-store-primitive"
CREATE TABLE IF NOT EXISTS `test-store-primitive` (`intField` INTEGER, `stringField` VARCHAR, `KEY` INTEGER) WITH ('connector'='venice', 'key.fields'='KEY', 'key.fields-prefix'='', 'key.type'='PRIMITIVE', 'partial-update-mode'='true', 'storeName'='test-store-primitive', 'value.fields-include'='EXCEPT_KEY');
CREATE TABLE IF NOT EXISTS `test-store` (`intField` INTEGER, `stringField` VARCHAR, `KEY_id` INTEGER) WITH ('connector'='venice', 'key.fields'='KEY_id', 'key.fields-prefix'='KEY_', 'key.type'='RECORD', 'partial-update-mode'='true', 'storeName'='test-store', 'value.fields-include'='EXCEPT_KEY');
INSERT INTO `test-store` (`intField`, `KEY_id`) SELECT `intField`, `KEY` AS `KEY_id` FROM `VENICE-CLUSTER0`.`test-store-primitive`;