test(_mapdata): update verification files for `master_type: str`
Use the following command:
```
$ GREP_SED="^\(\s\+master_type: \)true" \
&& grep -rl "${GREP_SED}" test/integration/ \
| xargs sed -i -e "/${GREP_SED}/s//\1str/"
```
Use the following command:
```
$ GREP_SED="^\(\s\+master_type: \)true" \
&& grep -rl "${GREP_SED}" test/integration/ \
| xargs sed -i -e "/${GREP_SED}/s//\1str/"
```
mentioned in commit 0f2dbe0f
·mentioned in commit 0f2dbe0f