Attribute gauge breaks prometheus metrics

[iramiller]

Summary of Bug

Metrics are broken due to attribute module invalid gauge.

Version

v1.3.0-HEAD

Steps to Reproduce

Enable metrics, query metrics endpoint

An error has occurred while serving metrics:
5 error(s) occurred:
* collected metric attribute_add label:<name:"account" value:"pb196v4x39k2q4ldmedjsm3z8338tfe0w402sv29e" > label:<name:"name" value:"figureomni.wireref.omnibus.pb" > label:<name:"owner" value:"pb13p3fe2ydk7p6q9th5gl5ha4vmnz3ztpheqmkvz" > label:<name:"type" value:"ATTRIBUTE_TYPE_BYTES" > counter:<value:1 >  should be a Gauge
* collected metric attribute_add label:<name:"account" value:"pb1p8zu0v2jadeaf8k72c7z45u6c74ksn0m9f82dp" > label:<name:"name" value:"figureomni.wireref.omnibus.pb" > label:<name:"owner" value:"pb13p3fe2ydk7p6q9th5gl5ha4vmnz3ztpheqmkvz" > label:<name:"type" value:"ATTRIBUTE_TYPE_BYTES" > counter:<value:1 >  should be a Gauge

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