chore: Cleanup connectors

[zregvart]

This fixes obvious connector definition errors:

• properly names salesforce-delete-sobject connector
• adds missing DTO for salesforce-get-sobject connector
• revises SQL Stored procedure connector component name and descriptor
• implements Maven build to emulate camel-connector-package plugin
• renames periodic-timer to periodic-timer-connector to prevent name clash with Camel
• connector rebuild changes the version in descriptors

[pure-bot[bot]]

Pull request approved by @jimmidyson - applying approved label