Fix #260, Remove registration of empty EVS filters

[skliper]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

• Fix Registering 100+ event filters w/ 0x0000 values serves no purpose (and overflows a typical filter buffer) #260

Testing performed
CI

Expected behavior changes
Eliminates CFE_EVS_Registration filter truncation message and no longer registers empty filters

System(s) tested on
CI

Additional context
None

Third party code
None

Contributor Info - All information REQUIRED for consideration of pull request
Jacob Hageman - NASA/GSFC

[astrogeco]

CCB:2022-06-15 APPROVED