FLOAT64 is not correctly generated in changelogs

[marcindyjas]

Descripton:

Type FLOAT64 is not correctly generated using both generateChangeLog diffChangeLog command.

Steps to reproduce:

Use for example DDL as below to create new table on Spanner:

CREATE TABLE TEST_TABLE (
TEST_FLOAT64 FLOAT64 NOT NULL,
) PRIMARY KEY(TEST_FLOAT64)

Then run:
liquibase --url="jdbc:cloudspanner:/projects/<project>/instances/<instance>/databases/<database>" --changeLogFile=changeLog.yml generateChangeLog

ChangeLog contains "FLOAT64(15,16)" instead of "FLOAT64".

[olavloite]

Fixed in #80