[JIRA] add parameter `validateQuery` for search API (#752)
[JIRA] add parameter `validateQuery` for search API (#752)

Allows users to set the parameter `validateQuery` for the Search
API. This can be useful in situations where a request for issue
key(s) contains a deleted issue, preventing:

```
{"errorMessages":["An issue with key 'DELETED-1' does not exist
for field 'key'."],"errors":{}}
```
AstroTech/atlassian-python-api,AstroTech/atlassian-python-api