Bump ebean-test-containers dependency - improved SQL Server handling

Improvments around collation changes that end up making SQL Server startup flaky

Author: rbygrave

pom.xml

@@ -51,7 +51,7 @@
     <ebean-ddl-runner.version>2.3</ebean-ddl-runner.version>
     <ebean-migration-auto.version>1.2</ebean-migration-auto.version>
     <ebean-migration.version>14.2.0</ebean-migration.version>
-    <ebean-test-containers.version>7.6</ebean-test-containers.version>
+    <ebean-test-containers.version>7.7</ebean-test-containers.version>
     <ebean-datasource.version>9.0</ebean-datasource.version>
     <ebean-agent.version>14.9.0</ebean-agent.version>
     <ebean-maven-plugin.version>14.9.0</ebean-maven-plugin.version>