Add Oracle jdbc dependencies

Fixes #1040

Author: dturanski

spring-cloud-skipper-server-core/pom.xml

@@ -105,6 +105,10 @@
 			<groupId>org.postgresql</groupId>
 			<artifactId>postgresql</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>com.oracle.database.jdbc</groupId>
+			<artifactId>ojdbc8</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>com.microsoft.sqlserver</groupId>
 			<artifactId>mssql-jdbc</artifactId>