Fix compatibility issue with KC 26.3.3 

Further fix LDAP sync not encrypted issue. Also, the spi-user-provider flag is no longer needed.

Resolved GH-13: user data synced from LDAP were not encrypted 

Resolved GH-11: unable to generate encryption key when DB URL is defi… …ned using configuration parameter instead of environment variable

Resolved GH-9 (compatibility issue with KC 26.2.x) 

Resolved GH-6