Fix shellcheck errors on output redirection [SC2328]

heartbeat/smb-share:436:36: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/smb-share:450:36: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/jira:78:95: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/jira:149:95: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/proftpd:145:51: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/minio:126:77: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/iface-bridge:681:27: error: This redirection takes output away from the command substitution (use tee to duplicate). [SC2328]
heartbeat/iface-bridge:697:29: error: This redirection takes output away from the command substitution (use tee to duplicate). [SC2328]
heartbeat/iface-bridge:713:28: error: This redirection takes output away from the command substitution (use tee to duplicate). [SC2328]
heartbeat/iface-bridge:726:27: error: This redirection takes output away from the command substitution (use tee to duplicate). [SC2328]
heartbeat/kamailio:480:126: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/kamailio:483:126: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/kamailio:486:128: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/kamailio:489:132: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/kamailio:493:124: error: This redirection takes output away from the command substitution. [SC2328]
heartbeat/ZFS:93:41: error: This redirection takes output away from the command substitution. [SC2328]