Use last found Owner annotation

**Describe the bug**
Incorrect owner in allure report if we specify other owner for test method then for class via @Owner annotation.

**To Reproduce**
1. create the following test class

```
import io.qameta.allure.android.annotations.Owner
import org.junit.Test

@Owner("Vasia")
class TestClass {
@Test
fun test1(){ }

@Owner("Kolya")
@Test
fun test2(){ }
}
```

2. run tests in that class
3. generate allure report from allure-results

**Expected behavior**
For test2() we see owner=Kolya

**Actual result**
For test2() we see owner=Vasia

**Environment (please complete the following information):**

| Allure version | 2.0.3 |
| --- | --- |
| Test framework | junit@4.12 |
| Generate report using | allure-cli@2.13.5 |