GUACAMOLE-2139: Migrate all license information to new automated format.

doc/licenses/spring-framework/LICENSE

@@ -0,0 +1,4 @@
+# Name:    Spring Framework
+# URL:     https://spring.io/projects/spring-framework
+# From:    'Spring' (https://spring.io/)
+# License: Apache v2.0

doc/licenses/spring-framework/dep-coordinates.txt

@@ -0,0 +1,6 @@
+org.springframework:spring-aop:jar:*
+org.springframework:spring-asm:jar:*
+org.springframework:spring-beans:jar:*
+org.springframework:spring-context:jar:*
+org.springframework:spring-core:jar:*
+org.springframework:spring-expression:jar:*