use MariaDB ConnectorJ instead of Drizzle MySQL JDBC driver -only- during build for Flyway (fixes FINERACT-761)

fineract-provider/build.gradle

@@ -424,14 +424,26 @@ buildscript {
 
     dependencies {
         classpath "org.flywaydb:flyway-gradle-plugin:3.0" // version upgraded during Spring Boot & MariaDB4j work, as prev. used v0.2 didn't work well after *.sql moved from fineract-db to fineract-provider/src/main/resources (new version also has clearer errors, e.g. in case of missing DB)
-        classpath 'org.drizzle.jdbc:drizzle-jdbc:1.3'
+
+        // NOT classpath 'org.drizzle.jdbc:drizzle-jdbc:1.3' as it is not compatible with Flyway 3.1+ (only up to 3.0)
+        // We require Flyway 3.1+ because =< 3.0 is not compatible with current Gradle versions (only ancient ones we originally used to use).
+        // Using LGPL ConnectorJ ()org.mariadb.jdbc:mariadb-java-client) instead of the BSD licensed drizzle-jdbc *IS OK* at Apache.org,
+        // as long as it's only used as a test library by developers at build time, and not end-user distributed, and optional.
+        // So it's OK here, but would not be as a default runtime dependency and in the dist JAR/WAR.
+        // see https://issues.apache.org/jira/browse/LEGAL-462
+        // see https://issues.apache.org/jira/browse/FINERACT-761
+        // see https://github.com/flyway/flyway/issues/2332
+        // see https://github.com/krummas/DrizzleJDBC/issues/46
+        // see https://github.com/apache/fineract/pull/525
+        // see https://github.com/apache/fineract/pull/550
+	classpath 'org.mariadb.jdbc:mariadb-java-client:2.4.1'
     }
 }
 
 
 flyway {
-    url = "jdbc:mysql:thin://localhost:3306/mifostenant-default"
-	driver = "org.drizzle.jdbc.DrizzleDriver"
+    url = "jdbc:mariadb://localhost:3306/mifostenant-default"
+    driver = "org.mariadb.jdbc.Driver"
     user = mysqlUser
     password = mysqlPassword
 }
@@ -445,8 +457,8 @@ task migrateTenantDB<<{
 		tenantDbName = rootProject.getProperty("dbName")
 	}
 
-    flyway.url= "jdbc:mysql:thin://localhost:3306/$tenantDbName"
-	flyway.driver = "org.drizzle.jdbc.DrizzleDriver"
+    flyway.url= "jdbc:mariadb://localhost:3306/$tenantDbName"
+    flyway.driver = "org.mariadb.jdbc.Driver"
     flyway.locations= [filePath]
     /**We use ${ as the prefix for strecthy reporting, do not want them to be interpreted by Flyway**/
     flyway.placeholderPrefix = "\$\${"
@@ -462,8 +474,8 @@ task showTenantDBInfo<<{
 		tenantDbName = rootProject.getProperty("dbName")
 	}
 
-    flyway.url= "jdbc:mysql:thin://localhost:3306/$tenantDbName"
-	flyway.driver = "org.drizzle.jdbc.DrizzleDriver"
+    flyway.url= "jdbc:mariadb://localhost:3306/$tenantDbName"
+    flyway.driver = "org.mariadb.jdbc.Driver"
     flyway.locations= [filePath]
     flywayInfo.execute()
 }
@@ -478,8 +490,8 @@ task migrateTenantListDB<<{
 		tenantsDbName = rootProject.getProperty("dbName")
 	}
 
-    flyway.url= "jdbc:mysql:thin://localhost:3306/$tenantsDbName"
-	flyway.driver = "org.drizzle.jdbc.DrizzleDriver"
+    flyway.url= "jdbc:mariadb://localhost:3306/$tenantsDbName"
+    flyway.driver = "org.mariadb.jdbc.Driver"
     flyway.locations= [filePath]
 
     flywayMigrate.execute()
@@ -494,8 +506,8 @@ task showTenantListDBInfo<<{
 		tenantsDbName = rootProject.getProperty("dbName")
 	}
 
-    flyway.url= "jdbc:mysql:thin://localhost:3306/$tenantsDbName"
-	flyway.driver = "org.drizzle.jdbc.DrizzleDriver"
+    flyway.url= "jdbc:mariadb://localhost:3306/$tenantsDbName"
+    flyway.driver = "org.mariadb.jdbc.Driver"
     flyway.locations= [filePath]
     flywayInfo.execute()
 }
@@ -509,8 +521,8 @@ task repairTenantDB<<{
         tenantsDbName = rootProject.getProperty("dbName")
     }
 
-    flyway.url= "jdbc:mysql:thin://localhost:3306/$tenantsDbName"
-	flyway.driver = "org.drizzle.jdbc.DrizzleDriver"
+    flyway.url= "jdbc:mariadb://localhost:3306/$tenantsDbName"
+    flyway.driver = "org.mariadb.jdbc.Driver"
     flyway.locations= [filePath]
     flywayRepair.execute()
 }