Align method signature of conflicting String[] and String.. declaration

Under JDK 1.8 this causes unresolvable compiler warnings even in your
derived classes:
 java: checkDatabaseChangeLogTable() in liquibase.database.AbstractJdbcDatabase
       implements checkDatabaseChangeLogTable(...,java.lang.String[]) in
       liquibase.database.Database; overridden method has no '...'
Merge pull request #208 from bschmid/hotfix/java8-varargs-warning-3.0.x

Align method signature of conflicting String[] and String.. declaration