Convert to use https for repositories

complete/build.gradle

 buildscript {
     repositories {
-        maven { url "http://repo.spring.io/libs-release" }
+        maven { url "https://repo.spring.io/libs-release" }
         mavenLocal()
         mavenCentral()
     }
 repositories {
     mavenLocal()
     mavenCentral()
-    maven { url "http://repo.spring.io/libs-release" }
+    maven { url "https://repo.spring.io/libs-release" }
 }
 
 dependencies {

complete/pom.xml

     <repositories>
         <repository>
             <id>spring-releases</id>
-            <url>http://repo.spring.io/libs-release</url>
+            <url>https://repo.spring.io/libs-release</url>
         </repository>
     </repositories>
     <pluginRepositories>
         <pluginRepository>
             <id>spring-releases</id>
-            <url>http://repo.spring.io/libs-release</url>
+            <url>https://repo.spring.io/libs-release</url>
         </pluginRepository>
     </pluginRepositories>
 </project>

initial/build.gradle

 buildscript {
     repositories {
-        maven { url "http://repo.spring.io/libs-release" }
+        maven { url "https://repo.spring.io/libs-release" }
         mavenLocal()
         mavenCentral()
     }
 repositories {
     mavenLocal()
     mavenCentral()
-    maven { url "http://repo.spring.io/libs-release" }
+    maven { url "https://repo.spring.io/libs-release" }
 }
 
 dependencies {

initial/pom.xml

     <repositories>
         <repository>
             <id>spring-releases</id>
-            <url>http://repo.spring.io/libs-release</url>
+            <url>https://repo.spring.io/libs-release</url>
         </repository>
     </repositories>
     <pluginRepositories>
         <pluginRepository>
             <id>spring-releases</id>
-            <url>http://repo.spring.io/libs-release</url>
+            <url>https://repo.spring.io/libs-release</url>
         </pluginRepository>
     </pluginRepositories>
 </project>