Workaround a bug/change in epmc metadata export 
Workaround a bug/change in epmc metadata export 

Enables recovery in lxml ETree iterparse to avoid crashing on unhandled 
characters.

Should be reviewed if/when epmc get back to us with a fix

RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline