Added a single method for insert and updating queries.
Added properties file for knowledge database configuration.
Modified KnowledgeDBClient. The client can now load database configuration from the "knowledge_db.properties" file. Note that the path to this file should be in the environment variable "KNOWLEDGE_DB_PROPERTIES".
Modified KnowledgeDBClient. The client can now load database configuration from the "knowledge_db.properties" file.

Note that the path to this file should be in the environment variable "KNOWLEDGE_DB_PROPERTIES".