Update Spring Boot & Hateoas (#430)

* Upgrade spring boot 1.4.4 and hateoas 0.23. Removed unneded dependency,

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Avoid link change with new hateoas version.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Readded commons.io

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Update MariaDB driver to 1.5.7

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Added missing content to docs.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fix equals.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Simplify

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fix equal after removal of commons collections.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

hawkbit-ui/pom.xml

@@ -204,10 +204,6 @@
          <groupId>org.springframework.security</groupId>
          <artifactId>spring-security-web</artifactId>
       </dependency>
-      <dependency>
-         <groupId>org.apache.commons</groupId>
-         <artifactId>commons-collections4</artifactId>
-      </dependency>
 
       <dependency>
          <groupId>com.vaadin</groupId>