Update to spring boot 1.5.6 and cloud Dalston.SR2

pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>1.5.4.RELEASE</version>
+        <version>1.5.6.RELEASE</version>
         <relativePath/>
     </parent>
     <groupId>de.codecentric</groupId>
@@ -18,15 +18,15 @@
     <properties>
         <java.version>1.7</java.version>
         <main.basedir>${basedir}</main.basedir>
-        <spring-boot.version>1.5.4.RELEASE</spring-boot.version>
-        <spring-cloud.version>Dalston.SR1</spring-cloud.version>
+        <spring-boot.version>1.5.6.RELEASE</spring-boot.version>
+        <spring-cloud.version>Dalston.SR2</spring-cloud.version>
         <hystrix-dashboard.version>1.5.5</hystrix-dashboard.version>
-        <build-plugin.jacoco.version>0.7.7.201606060606</build-plugin.jacoco.version>
-        <build-plugin.coveralls.version>4.2.0</build-plugin.coveralls.version>
+        <build-plugin.jacoco.version>0.7.9</build-plugin.jacoco.version>
+        <build-plugin.coveralls.version>4.3.0</build-plugin.coveralls.version>
         <build-plugin.gpg.version>1.6</build-plugin.gpg.version>
-        <build-plugin.asciidoctor.version>1.5.3</build-plugin.asciidoctor.version>
-        <build-plugin.exec.version>1.4.0</build-plugin.exec.version>
-        <build-plugin.git-commit-id.version>2.2.1</build-plugin.git-commit-id.version>
+        <build-plugin.asciidoctor.version>1.5.5</build-plugin.asciidoctor.version>
+        <build-plugin.exec.version>1.6.0</build-plugin.exec.version>
+        <build-plugin.git-commit-id.version>2.2.2</build-plugin.git-commit-id.version>
     </properties>
     <modules>
         <module>spring-boot-admin-server</module>