SGF-456 - Dependency upgrades prior to release.

- Spring 4.1.9
- Jackson 2.6.4

gradle.properties

@@ -5,10 +5,10 @@ gemfireVersion=8.1.0
 spring.range="[4.0.0, 5.0.0)"
 aspectjVersion=1.8.5
 springDataBuildVersion=1.7.2.BUILD-SNAPSHOT
-springVersion=4.1.8.RELEASE
+springVersion=4.1.9.RELEASE
 springDataCommonsVersion=1.11.2.BUILD-SNAPSHOT
 log4jVersion=1.2.17
 hamcrestVersion=1.3
 version=1.7.2.BUILD-SNAPSHOT
-jacksonVersion=2.6.0
+jacksonVersion=2.6.4
 mockitoVersion=1.10.19