Upgrade to Spring Boot 1.4.0.RELEASE

This commit upgrades to Spring Boot 1.4.0.RELEASE and bumps to Java8. It
also migrate the cache library from Guava to Caffeeine.

The git and build information are now exposed via the `info` endpoint.

Closes gh-251

initializr-service/pom.xml

@@ -33,15 +33,43 @@
 				<groupId>org.codehaus.gmavenplus</groupId>
 				<artifactId>gmavenplus-plugin</artifactId>
 			</plugin>
+			<plugin>
+				<groupId>pl.project13.maven</groupId>
+				<artifactId>git-commit-id-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>revision</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<dateFormat>yyyy-MM-dd'T'HH:mm:ssZ</dateFormat>
+					<generateGitPropertiesFile>true</generateGitPropertiesFile>
+					<generateGitPropertiesFilename>${project.build.outputDirectory}/git.properties</generateGitPropertiesFilename>
+				</configuration>
+			</plugin>
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
 				<executions>
 					<execution>
+						<id>repackage</id>
 						<goals>
 							<goal>repackage</goal>
 						</goals>
 					</execution>
+					<execution>
+						<id>build information</id>
+						<goals>
+							<goal>build-info</goal>
+						</goals>
+						<configuration>
+							<additionalProperties>
+								<versions.spring-boot>${spring.boot.version}</versions.spring-boot>
+							</additionalProperties>
+						</configuration>
+					</execution>
 				</executions>
 			</plugin>
 		</plugins>

initializr-service/src/main/resources/application.yml

@@ -1,11 +1,3 @@
-info:
-  project:
-    name: Spring Start
-    version: 0.4.0
-  # remember to update static/install.sh as well:
-  spring-boot:
-    version: 1.3.6.RELEASE
-
 logging:
   level:
     org.springframework.core.env: warn
@@ -17,6 +9,11 @@ server:
     mime-types: application/json,text/css,text/html
     min-response-size: 2048
 
+spring:
+  jackson:
+    serialization:
+     write-dates-as-timestamps: false
+
 initializr:
   env:
     boms:
@@ -753,3 +750,4 @@ initializr:
     - name: 1.1.12
       id: 1.1.12.RELEASE
       default: false
+