Description of problem:
Executing:

1. hammer erratum list \
   --organization-id=1 \
   --content-view=rhel77_e4s \
   --lifecycle-environment=Development \
   --errata-restrict-installable=yes

...results in this output:

Error: environment not found.

(I get the same error if I specify "Library".) Yet, this slightly different command:

1. hammer erratum list \
   --organization-id=1 \
   --content-view=rhel77_e4s \
   --lifecycle-environment-id=2 \
   --errata-restrict-installable=yes

...succeeds. FYI, lifecycle environment ID #2 is "Development":

1. hammer lifecycle-environment list \
   --organization-id=1
   --|-----------|-------
   ID | NAME | PRIOR
   --|-----------|-------
   2 | Development | Library
   1 | Library |
   --|-----------|-------

Version-Release number of selected component (if applicable):
tfm-rubygem-hammer_cli-2.5.1-1.el7sat.noarch