Fix memory release on entities creation (backport #280)

[mergify[bot]]

This is an automatic backport of pull request #280 done by Mergify.

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[github-actions[bot]]

Static memory analysis

Default configuration

MTU: 512 B Input buffer size: 2048 B Input history: 4 Output buffer size: 2048 B Output history: 4

Entity	Qty	Size per unit
Context	2	5616 B
Topic	8	56 B
Service	4	248 B
Client	4	248 B
Subscription	4	272 B
Publisher	4	280 B
Node	4	208 B
Static input buffer	8	2136 B
Init options	6	64 B
Wait sets	4	56 B
Guard Condition	4	64 B

TOTAL: 34436 B

[codecov-commenter]

Codecov Report

Base: 48.85% // Head: 48.76% // Decreases project coverage by -0.09% :warning:

Coverage data is based on head (c160b95) compared to base (1781634). Patch coverage: 42.30% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## foxy #283 +/- ## ========================================== - Coverage 48.85% 48.76% -0.09% ========================================== Files 41 41 Lines 1701 1700 -1 Branches 494 501 +7 ========================================== - Hits 831 829 -2 - Misses 638 639 +1 Partials 232 232 ``` | [Impacted Files](https://codecov.io/gh/micro-ROS/rmw_microxrcedds/pull/283?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS) | Coverage Δ | | |---|---|---| | [rmw\_microxrcedds\_c/src/rmw\_node.c](https://codecov.io/gh/micro-ROS/rmw_microxrcedds/pull/283?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS#diff-cm13X21pY3JveHJjZWRkc19jL3NyYy9ybXdfbm9kZS5j) | `39.44% <0.00%> (-3.13%)` | :arrow_down: | | [rmw\_microxrcedds\_c/src/rmw\_microxrcedds\_topic.c](https://codecov.io/gh/micro-ROS/rmw_microxrcedds/pull/283?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS#diff-cm13X21pY3JveHJjZWRkc19jL3NyYy9ybXdfbWljcm94cmNlZGRzX3RvcGljLmM=) | `43.33% <25.00%> (-0.22%)` | :arrow_down: | | [rmw\_microxrcedds\_c/src/rmw\_publisher.c](https://codecov.io/gh/micro-ROS/rmw_microxrcedds/pull/283?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS#diff-cm13X21pY3JveHJjZWRkc19jL3NyYy9ybXdfcHVibGlzaGVyLmM=) | `48.09% <60.00%> (ø)` | | | [rmw\_microxrcedds\_c/src/rmw\_subscription.c](https://codecov.io/gh/micro-ROS/rmw_microxrcedds/pull/283?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS#diff-cm13X21pY3JveHJjZWRkc19jL3NyYy9ybXdfc3Vic2NyaXB0aW9uLmM=) | `53.28% <60.00%> (ø)` | | | [rmw\_microxrcedds\_c/src/rmw\_client.c](https://codecov.io/gh/micro-ROS/rmw_microxrcedds/pull/283?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS#diff-cm13X21pY3JveHJjZWRkc19jL3NyYy9ybXdfY2xpZW50LmM=) | `49.09% <100.00%> (+1.30%)` | :arrow_up: | | [rmw\_microxrcedds\_c/src/rmw\_service.c](https://codecov.io/gh/micro-ROS/rmw_microxrcedds/pull/283?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS#diff-cm13X21pY3JveHJjZWRkc19jL3NyYy9ybXdfc2VydmljZS5j) | `48.18% <100.00%> (+0.81%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=micro-ROS)

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