chore(deps): bump github.com/olivere/elastic/v7 from 7.0.14 to 7.0.15

Bumps [github.com/olivere/elastic/v7](https://github.com/olivere/elastic) from 7.0.14 to 7.0.15.
- [Release notes](https://github.com/olivere/elastic/releases)
- [Changelog](https://github.com/olivere/elastic/blob/release-branch.v7/CHANGELOG-3.0.md)
- [Commits](olivere/elastic@v7.0.14...v7.0.15)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/go-kit/kit v0.10.0
 	github.com/klauspost/cpuid v1.2.1 // indirect
 	github.com/linkedin/goavro/v2 v2.9.7
-	github.com/olivere/elastic/v7 v7.0.14
+	github.com/olivere/elastic/v7 v7.0.15
 	github.com/onsi/ginkgo v1.8.0 // indirect
 	github.com/onsi/gomega v1.5.0 // indirect
 	github.com/pkg/errors v0.9.1

go.sum

@@ -228,6 +228,8 @@ github.com/olivere/elastic/v7 v7.0.13 h1:rQdxt2duc9aoHkfa4p2PH3HOYkynjUygzmEPyec
 github.com/olivere/elastic/v7 v7.0.13/go.mod h1:14rWX28Pnh3qCKYRVnSGXWLf9MbLonYS/4FDCY3LAPo=
 github.com/olivere/elastic/v7 v7.0.14 h1:89dYPg6kD3WJx42ZtO4U6WDIzRy69FvQqz/yRiwekuM=
 github.com/olivere/elastic/v7 v7.0.14/go.mod h1:+FgncZ8ho1QF3NlBo77XbuoTKYHhvEOfFZKIAfHnnDE=
+github.com/olivere/elastic/v7 v7.0.15 h1:v7kX5S+oMFfYKS4ZyzD37GH6lfZSpBo9atynRwBUywE=
+github.com/olivere/elastic/v7 v7.0.15/go.mod h1:+FgncZ8ho1QF3NlBo77XbuoTKYHhvEOfFZKIAfHnnDE=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.8.0 h1:VkHVNpR4iVnU8XQR6DBm8BqYjN7CRzw+xKUbVVbbW9w=