FINERACT-1926: Fineract Asset Externalization new asset events

- [x] Add LoanOwnershipTransferBusinessEvent
- [x] Add LoanAccountSnapshotBusinessEvent
- [x] Move packages to the right packages
- [X] Implement LoanOwnershipTransferBusinessEvent serializer
- [x] Call cancel/buyback/sale event
- [x] Unit tests

fineract-core/dependencies.gradle

@@ -28,7 +28,6 @@ dependencies {
             )
 
     // implementation dependencies are directly used (compiled against) in src/main (and src/test)
-    //
     implementation(
             'org.springframework.boot:spring-boot-starter-web',
             'org.springframework.boot:spring-boot-starter-security',
@@ -127,4 +126,8 @@ dependencies {
         exclude group: 'com.zaxxer', module: 'HikariCP-java7'
     }
     testImplementation ('org.mockito:mockito-inline')
+    implementation('org.apache.avro:avro')
+    implementation(
+            project(path: ':fineract-avro-schemas')
+            )
 }