[SCB-147] Delete old metrics of version 0.5.0 in foundation-metrics

[zhengyangyong]

Signed-off-by: zhengyangyong yangyong.zheng@huawei.com

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Had memory leak problem

[coveralls]

Coverage decreased (-0.07%) to 87.362% when pulling 5a5d3a8 on zhengyangyong:SCB-147 into 8e84b30 on apache:master.

[WillemJiang]

Integration test failed due to removing the servo dependency.