With every ticket store/update operation (triggered, for example, by a login) RSS memory consumption of 'sssd_kcm' process increases.

In talloc report it is seen as:
```
...
struct sss_sec_ctx contains 99586091 bytes in 146792 blocks (ref 0) 0x55a89cfcf0a0
src/responder/kcm/secrets/secrets.c:1103 contains 2560 bytes in 1 blocks (ref 0) 0x55a8a409e380
src/responder/kcm/secrets/secrets.c:1103 contains 37 bytes in 1 blocks (ref 0) 0x55a8a407ac70
src/responder/kcm/secrets/secrets.c:1006 contains 80 bytes in 1 blocks (ref 0) 0x55a8a4086340
src/responder/kcm/secrets/secrets.c:1103 contains 37 bytes in 1 blocks (ref 0) 0x55a8a3fcd610
src/responder/kcm/secrets/secrets.c:1103 contains 2560 bytes in 1 blocks (ref 0) 0x55a8a409d910
...
```