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

doc/licenses/caffeine/LICENSE

@@ -0,0 +1,4 @@
+# Name:    Caffeine
+# URL:     https://github.com/ben-manes/caffeine
+# From:    'Ben Manes' (https://github.com/ben-manes)
+# License: Apache v2.0

doc/licenses/caffeine/dep-coordinates.txt

@@ -0,0 +1 @@
+com.github.ben-manes.caffeine:caffeine:jar:*