Exception org.h2.jdbc.JdbcSQLException: Hexadecimal string with odd
number of characters: "0" is thrown when number with value 0 or string
with value "0" is stored in H2Cache and read is performed.
The fix modifies implementation so that Java de-serialization is
performed even for built-in (e.g. Integer) types.
Change-Id: I953487cb75b3712e8825a74613977425873507a1
Signed-off-by: Jacek Centkowski <geminica.programs@gmail.com>