bcprov-jdk15on -> bcpkix-jdk150n

This fixes the Spring IO checks since bcprov-jdk15on is not part of Spring
IO platform.

Issue gh-3702

crypto/crypto.gradle

@@ -12,5 +12,5 @@ configure(project.tasks.withType(Test)) {
 }
 
 dependencies {
-	optional 'org.bouncycastle:bcprov-jdk15on:1.54'
+	optional 'org.bouncycastle:bcpkix-jdk15on:1.54'
 }