Added support for request-based SLIs in monitoring SLO (#3491) (#2058)

* initial slo resource

* whitespace and update mask

* add exactly X of to slo descriptions

* unit tests

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/3491.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+monitoring: Added `request_based` SLI support to `google_monitoring_slo` 
+```

google-beta/resource_app_engine_domain_mapping.go

@@ -293,7 +293,8 @@ func resourceAppEngineDomainMappingUpdate(d *schema.ResourceData, meta interface
 	updateMask := []string{}
 
 	if d.HasChange("ssl_settings") {
-		updateMask = append(updateMask, "ssl_settings.certificate_id,ssl_settings.ssl_management_type")
+		updateMask = append(updateMask, "ssl_settings.certificate_id",
+			"ssl_settings.ssl_management_type")
 	}
 	// updateMask is a URL parameter but not present in the schema, so replaceVars
 	// won't set it

google-beta/resource_kms_crypto_key.go

@@ -272,7 +272,8 @@ func resourceKMSCryptoKeyUpdate(d *schema.ResourceData, meta interface{}) error
 	}
 
 	if d.HasChange("rotation_period") {
-		updateMask = append(updateMask, "rotationPeriod,nextRotationTime")
+		updateMask = append(updateMask, "rotationPeriod",
+			"nextRotationTime")
 	}
 
 	if d.HasChange("version_template") {