Handle MariaDB syntax add column IF EXISTS as part of alter table DDL

trace: "org.apache.kafka.connect.errors.ConnectException: no viable alternative
 at input 'ALTER TABLE `organization_transfer_organization_users`\n ADD COLUMN IF'
 at io.debezium.connector.mysql.AbstractReader.wrap(AbstractReader.java:230)
 at io.debezium.connector.mysql.AbstractReader.failed(AbstractReader.java:207)
 at io.debezium.connector.mysql.BinlogReader.handleEvent(BinlogReader.java:575)
 at com.github.shyiko.mysql.binlog.BinaryLogClient.notifyEventListeners(BinaryLogClient.java:1130)
 at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:978)
 at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:581)
 at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:860)
 at java.lang.Thread.run(Thread.java:748) Caused by: io.debezium.text.ParsingException: no viable alternative
 at input 'ALTER TABLE `organization_transfer_organization_users`\n ADD COLUMN IF'
 at io.debezium.antlr.ParsingErrorListener.syntaxError(ParsingErrorListener.java:40)
 at org.antlr.v4.runtime.ProxyErrorListener.syntaxError(ProxyErrorListener.java:41)
 at org.antlr.v4.runtime.Parser.notifyErrorListeners(Parser.java:544)
 at org.antlr.v4.runtime.DefaultErrorStrategy.reportNoViableAlternative(DefaultErrorStrategy.java:310)
 at org.antlr.v4.runtime.DefaultErrorStrategy.reportError(DefaultErrorStrategy.java:136)
 at io.debezium.ddl.parser.mysql.generated.MySqlParser.sqlStatements(MySqlParser.java:1121)
 at io.debezium.ddl.parser.mysql.generated.MySqlParser.root(MySqlParser.java:849)
 at io.debezium.connector.mysql.antlr.MySqlAntlrDdlParser.parseTree(MySqlAntlrDdlParser.java:68)
 at io.debezium.connector.mysql.antlr.MySqlAntlrDdlParser.parseTree(MySqlAntlrDdlParser.java:41)
 at io.debezium.antlr.AntlrDdlParser.parse(AntlrDdlParser.java:80)
 at io.debezium.connector.mysql.MySqlSchema.applyDdl(MySqlSchema.java:314)
 at io.debezium.connector.mysql.BinlogReader.handleQueryEvent(BinlogReader.java:768)
 at io.debezium.connector.mysql.BinlogReader.handleEvent(BinlogReader.java:558) ... 5 more Caused by: org.antlr.v4.runtime.NoViableAltException
 at org.antlr.v4.runtime.atn.ParserATNSimulator.noViableAlt(ParserATNSimulator.java:2026)
 at org.antlr.v4.runtime.atn.ParserATNSimulator.execATN(ParserATNSimulator.java:467)
 at org.antlr.v4.runtime.atn.ParserATNSimulator.adaptivePredict(ParserATNSimulator.java:393)
 at io.debezium.ddl.parser.mysql.generated.MySqlParser.sqlStatements(MySqlParser.java:923) ... 12 more "