Use ECS v1.8.0 (elastic#24086)

Replaces use of ecs 1.8 branch with v1.8.0 tag.

(cherry picked from commit 1b31c26)

NOTICE.txt

@@ -5891,11 +5891,11 @@ This Agreement is governed by the laws of the State of New York and the intellec
 
 --------------------------------------------------------------------------------
 Dependency : github.com/elastic/ecs
-Version: v1.0.0-beta2.0.20210202203518-638aa2bb5271
+Version: v1.8.0
 Licence type (autodetected): Apache-2.0
 --------------------------------------------------------------------------------
 
-Contents of probable licence file $GOMODCACHE/github.com/elastic/ecs@v1.0.0-beta2.0.20210202203518-638aa2bb5271/LICENSE.txt:
+Contents of probable licence file $GOMODCACHE/github.com/elastic/ecs@v1.8.0/LICENSE.txt:
 
 
                                  Apache License

go.mod

@@ -59,7 +59,7 @@ require (
 	github.com/dustin/go-humanize v1.0.0
 	github.com/eapache/go-resiliency v1.2.0
 	github.com/eclipse/paho.mqtt.golang v1.2.1-0.20200121105743-0d940dd29fd2
-	github.com/elastic/ecs v1.0.0-beta2.0.20210202203518-638aa2bb5271
+	github.com/elastic/ecs v1.8.0
 	github.com/elastic/elastic-agent-client/v7 v7.0.0-20200709172729-d43b7ad5833a
 	github.com/elastic/go-concert v0.0.4
 	github.com/elastic/go-libaudit/v2 v2.2.0

go.sum

@@ -243,8 +243,8 @@ github.com/eclipse/paho.mqtt.golang v1.2.1-0.20200121105743-0d940dd29fd2 h1:DW6W
 github.com/eclipse/paho.mqtt.golang v1.2.1-0.20200121105743-0d940dd29fd2/go.mod h1:H9keYFcgq3Qr5OUJm/JZI/i6U7joQ8SYLhZwfeOo6Ts=
 github.com/elastic/dhcp v0.0.0-20200227161230-57ec251c7eb3 h1:lnDkqiRFKm0rxdljqrj3lotWinO9+jFmeDXIC4gvIQs=
 github.com/elastic/dhcp v0.0.0-20200227161230-57ec251c7eb3/go.mod h1:aPqzac6AYkipvp4hufTyMj5PDIphF3+At8zr7r51xjY=
-github.com/elastic/ecs v1.0.0-beta2.0.20210202203518-638aa2bb5271 h1:lEqA6OOU2w/7cce5M2v6ZAaOqsTw2Q3ZFqSgbH0bMyQ=
-github.com/elastic/ecs v1.0.0-beta2.0.20210202203518-638aa2bb5271/go.mod h1:pgiLbQsijLOJvFR8OTILLu0Ni/R/foUNg0L+T6mU9b4=
+github.com/elastic/ecs v1.8.0 h1:wa61IDQsQcZyJa6hwbhqGO+631H+kGHhe0J4V7tMPZY=
+github.com/elastic/ecs v1.8.0/go.mod h1:pgiLbQsijLOJvFR8OTILLu0Ni/R/foUNg0L+T6mU9b4=
 github.com/elastic/elastic-agent-client/v7 v7.0.0-20200709172729-d43b7ad5833a h1:2NHgf1RUw+f240lpTnLrCp1aBNvq2wDi0E1A423/S1k=
 github.com/elastic/elastic-agent-client/v7 v7.0.0-20200709172729-d43b7ad5833a/go.mod h1:uh/Gj9a0XEbYoM4NYz4LvaBVARz3QXLmlNjsrKY9fTc=
 github.com/elastic/fsevents v0.0.0-20181029231046-e1d381a4d270 h1:cWPqxlPtir4RoQVCpGSRXmLqjEHpJKbR60rxh1nQZY4=

libbeat/_meta/fields.ecs.yml

@@ -1,5 +1,5 @@
 # WARNING! Do not edit this file directly, it was generated by the ECS project,
-# based on ECS version 1.8.0-dev.
+# based on ECS version 1.8.0.
 # Please visit https://github.com/elastic/ecs to suggest changes to ECS fields.
 
 - key: ecs