[wp] Removes old cache entries and update oracles

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/3b096d1ad2f60d27d68c9819789fceb4.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0677,
-  "steps": 169 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/3d5c736c9ebc4a910745c54e3f810000.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.1562,
-  "steps": 267 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/4524f3b1a3aaeae1f14f29cffc5532b4.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0207,
-  "steps": 82 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/45fc8639c2e8c14a8ba57fe664c24c9d.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0471,
-  "steps": 107 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/4833c149c493290f7476cb694c326889.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0372,
-  "steps": 61 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/51225dc69fc56402c586cbf2cad99281.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0262,
-  "steps": 76 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/5998e90eb1b10fc1fd4ff54e6ef5689e.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0977,
-  "steps": 179 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/5d20435c0b8e9bb4e51ab262b3129648.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.2324,
-  "steps": 210 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/5d3f4ea5bf6dc3f773faf7e0d63f1c76.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0397,
-  "steps": 111 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/6e15ce103fe14e50af7e0936d1d2a924.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.02, "steps": 64 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/75158755074596f3fba764a01a862cea.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0193,
-  "steps": 66 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/77066c103c80ea4e5f9b5605057d8d03.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0612,
-  "steps": 151 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/78c65afc8eeed0925d1f9c68b047f97a.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0156,
-  "steps": 76 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/7e81584b97fe9a89bed8cd913741db47.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0206,
-  "steps": 76 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/805d516e173e9a1980e332963ed26853.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0095,
-  "steps": 21 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/85bd4f374f9098d4767c14833e05b5b8.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0574,
-  "steps": 117 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/904dfd55419e9da26d6710c5e3bb2512.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0287,
-  "steps": 93 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/93d52e79f66a5fbbf8a8d577d910215e.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0898,
-  "steps": 195 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/9e3b12919ddd0b7f3deeaa63da75f6e5.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.0332,
-  "steps": 95 }

src/plugins/wp/tests/wp_gallery/oracle_qualif/frama_c_hashtbl_solved.0.session/cache/a82a6af66093c860d0011d4f227136d1.json

-{ "prover": "Alt-Ergo:2.0.0", "verdict": "valid", "time": 0.021,
-  "steps": 64 }