Bug Report: SecurityRequestError Doc references out of date

[ElijahSwiftIBM]

Describe the bug
Documentation error in 1.0b3. Numerous functions document SecurityRequestError as

Raises SecurityRequestErrorwhen the **Return Code** of a **Security Result** returned by IRRSMO00 is **NOT** equal to0``

This needs to be updated and all functions capable of raising SecurityRequestError in this way can also raise DownstreamFatalError as well.

To Reproduce
N/A

Expected behavior
Change documentation to

Raises SecurityRequestErrorwhen the **Return Code** of a **Security Result** returned by IRRSMO00 is equal to4``

also include comparable documentation for DownstreamFatalError

Console Output
N/A

[lcarcaramo]

Resolved by #62