DB specific properties not read when using !properties

[isc-pchung]

When using !properties to create connection, DB specific settings in the properties file are not getting set properly.

Seems to be due to this line

sqlline/src/main/java/sqlline/Commands.java

Line 1308 in 10c9a1f

Properties info = (Properties) props.get(CONNECT_PROPERTY);

When issuing
!properties connection.prop

Expecting the other properties besides the top 4 to be effective while creating connection, ie:
url=...
user=...
password=...
driver=...
dialect=...

[snuyanzin]

hi @isc-pchung

thanks for the issue raised.
It seems i was able to reproduce and to write a junit test for another field ALLOW_LITERALS for H2.
#398 should fix this issue