Fix ElevationConfidence constant in SDSM msgs

[willjohnsonk]

PR Details

Description

Previous message definitions of SensorDataSharingMessage.msg in cav_msgs, j3224_msgs, carma_v2x_msgs, and j3224_v2x_msgs had defined the value "HAS_REF_POS_XY_CONF" as an entry in the presence vector to access a valid ElevationConfidence message. This was updated to the value of "HAS_REF_POS_EL_CONF" to reflect the elevation namespace given the SAE J3224 specification.

Related GitHub Issue

Supports CARMA Messenger Issue #205

Related Jira Key

CDAR-130

Motivation and Context

Update to comply to SAE J3224 standard for SDSM

How Has This Been Tested?

carma-msgs builds successfully and the updated values work in the SDSM convertor

Types of changes

• [X] Defect fix (non-breaking change that fixes an issue)
• [ ] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that cause existing functionality to change)

Checklist:

• [ ] I have added any new packages to the sonar-scanner.properties file
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [X] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.