build(deps-dev): bump com.netflix.archaius:archaius-core (#2253)

Bumps [com.netflix.archaius:archaius-core](https://github.com/Netflix/archaius) from 0.7.7 to 0.7.8.
- [Release notes](https://github.com/Netflix/archaius/releases)
- [Commits](Netflix/archaius@v0.7.7...v0.7.8)

---
updated-dependencies:
- dependency-name: com.netflix.archaius:archaius-core
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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hystrix/pom.xml

@@ -50,7 +50,7 @@
     <dependency>
       <groupId>com.netflix.archaius</groupId>
       <artifactId>archaius-core</artifactId>
-      <version>0.7.7</version>
+      <version>0.7.8</version>
       <scope>test</scope>
     </dependency>