Release notes for 1.1.5 (#4088) (#4217)

content/about/notes/1.1.5/index.md

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+---
+title: Istio 1.1.5
+publishdate: 2019-05-03
+icon: notes
+release: 1.1.5
+---
+
+This release includes several bug fixes and improvements to robustness.  This release note describes what's different between Istio 1.1.4 and Istio 1.1.5.
+
+{{< relnote >}}

content/blog/2019/announcing-1.1.5/index.md

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+---
+title: Announcing Istio 1.1.5
+description: Istio 1.1.5 patch release.
+publishdate: 2019-05-03
+attribution: The Istio Team
+release: 1.1.5
+---
+
+We're pleased to announce the availability of Istio 1.1.5. Please see below for what's changed.
+
+{{< relnote >}}

content/boilerplates/notes/1.1.5.md

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+## Bug fixes
+
+- Add additional validation to Pilot to reject gateway configuration with overlapping hosts matches ([Issue 13717](https://github.com/istio/istio/issues/13717)).
+- Build against the latest stable version of `istio-cni` instead of the latest daily build ([Issue 13171](https://github.com/istio/istio/issues/13171)).
+
+## Small enhancements
+
+- Add additional logging to help diagnose hostname resolution failures ([Issue 13581](https://github.com/istio/istio/issues/13581)).
+- Improve ease of installing `prometheus` by removing unnecessary use of `busybox` image ([Issue 13501](https://github.com/istio/istio/issues/13501)).
+- Make Pilot Agent's certificate paths configurable ([Issue 11984](https://github.com/istio/istio/issues/11984)).
+