Migrate Build Process to Gradle [BATCH-2217]

[spring-projects-issues]

Gunnar Hillert opened BATCH-2217 and commented

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Sub-tasks:

• BATCH-2144 Convert Build from Maven to Gradle

• BATCH-2218 Remove Maven Pom files

• BATCH-2219 Update and Move Site Contents to Spring.io

• BATCH-2220 Update CI Configuration

• BATCH-2221 Convert jsr352-tck module to Gradle

• BATCH-2222 Update and polish Build/Release instructions

• BATCH-2223 Remove Maven Archetypes