Remove file hashes before caching

Author: cedricziel

.travis.yml

@@ -5,6 +5,8 @@ jdk:
 before_cache:
 - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
 - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+- rm -fr $HOME/.gradle/caches/*/fileHashes/fileHashes.bin
+- rm -fr $HOME/.gradle/caches/*/fileHashes/fileHashes.lock
 cache:
   directories:
   - $HOME/.gradle/caches/