Upgrade to Hazelcast 3.6.7

Closes spring-projectsgh-7678

Author: wilkinsona

spring-boot-dependencies/pom.xml

@@ -81,7 +81,7 @@
 		<gson.version>2.7</gson.version>
 		<h2.version>1.4.193</h2.version>
 		<hamcrest.version>1.3</hamcrest.version>
-		<hazelcast.version>3.6.6</hazelcast.version>
+		<hazelcast.version>3.6.7</hazelcast.version>
 		<hibernate.version>5.0.11.Final</hibernate.version>
 		<hibernate-validator.version>5.2.4.Final</hibernate-validator.version>
 		<hikaricp.version>2.4.7</hikaricp.version>