renaming session type enum

Replace XIO_SESSION_{REQ|REP} with XIO_SESSION_{CLINET|SERVER}
Old names were left in the header file for now in order not to
break current apllications.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
rename xio_release_connection_hello

Rename xio_release_connection_hello to xio_connection_release_hello
as all other release API have the form of xio_connection_release_XXX

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
rename conn to connection

Objects of struct xio_connection should be defined as *connection
and not *conn to prevent confusion with obect of struct xio_conn

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Second session failed to connect when connection is cached

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>