update changelog for 1.15.0 release (#114)

Author: dgrove-oss

core/java8/CHANGELOG.md

@@ -19,7 +19,7 @@
 
 # Java 8 OpenWhisk Runtime Container
 
-## 1.15.0 (next release)
+## 1.15.0
   - Include latest security fixes with every build.
   - adoptopenjdk/openjdk8-openj9:x86_64-ubuntu-jdk8u262-b10_openj9-0.21.0
 

core/java8actionloop/CHANGELOG.md

@@ -19,9 +19,10 @@
 
 # Java 8 OpenWhisk Runtime Container
 
-## 1.15.0 (next release)
+## 1.15.0
   - Include latest security fixes with every build.
-  - adoptopenjdk/openjdk8-openj9:x86_64-ubuntu-jdk8u262-b10_openj9-0.21.0
+  - Adopt openjdk/openjdk8-openj9:x86_64-ubuntu-jdk8u262-b10_openj9-0.21.0
+  - Build proxy using go 1.15 and openwhisk-runtime-go 1.16.0
 
 ## 1.14.0
   - Initial release of actionloop-based Java Action