v1.7

Refactored the statefulset definition, adding some new not required variables, like:

• java_version, not required and with 11 as a default value
• resources_limits_cpu, not required and with 1 as a default value
• resources_limits_memory, not required and with 1Gi as a default value
• resources_requests_cpu, not required and with 1 as a default value
• resources_requests_memory, not required and with 1Gi as a default value
• events_storage, not required and with 5Gi as a default value
• log_storage, not required and with 2Gi as a default value
• data_storage, not required and with 10Gi as a default value
• plugins_storage, not required and with 1Gi as a default value