The encryption_package cannot be updated without uninstalling it first

[nicolasriousset]

The encryption_package cannot be updated without uninstalling it first.

When executing
make install
while the library is already installed, the following error are displayed

vsql:ddl/install.sql:5: ROLLBACK 4213: Object "Encryption" already exists
vsql:ddl/install.sql:6: ROLLBACK 3472: Function with same name and number of parameters already exists: AESEncrypt
vsql:ddl/install.sql:7: ROLLBACK 3472: Function with same name and number of parameters already exists: AESDecrypt

This is really problematic when the functions are used in a Vertica column default expression, because as soon as the library is dropped, the whole table using the default expression is lost.

Replacing the "CREATE" statements with a "CREATE OR REPLACE" solves the issue.