[MM-20979] Add first implementation of the Bleve search engine (#14562)

* [MM-20979] Add first implementation of the Bleve search engine

* Fix i18n

* Migrate searchengine utils tests

* Fix linter

* Don't add allTermsQ if both termQueries and notTermQueries are empty

* Fix test that should work if user is system admin

* Modify naming according to review comments

* Abstract getIndexDir function

* Extracting bleve engine name as a constant

* Merge both Indexer interfaces into one

* Add worker stopped message

* Allow worker to be started/stopped with config change

* Use constants for index names

* Modify test order

* Fix linter

* Trying to unlock the CI

go.mod

@@ -4,27 +4,35 @@ go 1.14
 
 require (
 	github.com/Masterminds/squirrel v1.2.0
+	github.com/RoaringBitmap/roaring v0.4.23 // indirect
 	github.com/armon/go-metrics v0.3.0 // indirect
 	github.com/avct/uasurfer v0.0.0-20191028135549-26b5daa857f1
 	github.com/beevik/etree v1.1.0 // indirect
 	github.com/blang/semver v3.5.1+incompatible
+	github.com/blevesearch/bleve v1.0.7
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
 	github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd // indirect
 	github.com/corpix/uarand v0.1.1 // indirect
+	github.com/cznic/b v0.0.0-20181122101859-a26611c4d92d // indirect
+	github.com/cznic/mathutil v0.0.0-20181122101859-297441e03548 // indirect
+	github.com/cznic/strutil v0.0.0-20181122101858-275e90344537 // indirect
 	github.com/dgryski/dgoogauth v0.0.0-20190221195224-5a805980a5f3
 	github.com/disintegration/imaging v1.6.2
 	github.com/dyatlov/go-opengraph v0.0.0-20180429202543-816b6608b3c8
+	github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c // indirect
+	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
+	github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4 // indirect
 	github.com/fatih/color v1.9.0 // indirect
 	github.com/fortytw2/leaktest v1.3.0 // indirect
 	github.com/francoispqt/gojay v1.2.13
 	github.com/fsnotify/fsnotify v1.4.9
+	github.com/glycerine/go-unsnap-stream v0.0.0-20190901134440-81cf024a9e0a // indirect
 	github.com/go-asn1-ber/asn1-ber v1.4.1 // indirect
 	github.com/go-gorp/gorp v2.0.0+incompatible // indirect
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
-	github.com/golang/protobuf v1.4.0 // indirect
+	github.com/golang/protobuf v1.4.2 // indirect
 	github.com/google/uuid v1.1.1 // indirect
-	github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c // indirect
 	github.com/gorilla/handlers v1.4.2
 	github.com/gorilla/mux v1.7.4
 	github.com/gorilla/schema v1.1.0
@@ -44,7 +52,9 @@ require (
 	github.com/hashicorp/yamux v0.0.0-20190923154419-df201c70410d // indirect
 	github.com/icrowley/fake v0.0.0-20180203215853-4178557ae428
 	github.com/jaytaylor/html2text v0.0.0-20200412013138-3577fbdbcff7
+	github.com/jmhodges/levigo v1.0.0 // indirect
 	github.com/jmoiron/sqlx v1.2.0
+	github.com/jonboulle/clockwork v0.1.0
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/lib/pq v1.4.0
 	github.com/magiconair/properties v1.8.1 // indirect
@@ -72,7 +82,9 @@ require (
 	github.com/pelletier/go-toml v1.7.0 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.5.1
+	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/procfs v0.0.11 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20190728182440-6a916e37a237 // indirect
 	github.com/rs/cors v1.7.0
 	github.com/rudderlabs/analytics-go v3.2.1+incompatible
 	github.com/russellhaering/goxmldsig v0.0.0-20180430223755-7acd5e4a6ef7
@@ -90,7 +102,9 @@ require (
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	github.com/stretchr/objx v0.2.0 // indirect
 	github.com/stretchr/testify v1.5.1
+	github.com/tecbot/gorocksdb v0.0.0-20191217155057-f0fad39f321c // indirect
 	github.com/throttled/throttled v2.2.4+incompatible
+	github.com/tinylib/msgp v1.1.2 // indirect
 	github.com/tylerb/graceful v1.2.15
 	github.com/uber/jaeger-client-go v2.23.0+incompatible
 	github.com/uber/jaeger-lib v2.2.0+incompatible
@@ -104,7 +118,7 @@ require (
 	golang.org/x/image v0.0.0-20200119044424-58c23975cae1
 	golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
 	golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5
-	golang.org/x/sys v0.0.0-20200501145240-bc7a7d42d5c3 // indirect
+	golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9 // indirect
 	golang.org/x/text v0.3.2
 	golang.org/x/tools v0.0.0-20200428021058-7ae4988eb4d9
 	google.golang.org/genproto v0.0.0-20200424135956-bca184e23272 // indirect