=== Description of problem:
'sapconf' doesn't recognize the 'e4s' repositories and reports that SAP repositories are missing.

=== Version-Release number of selected component (if applicable):
sapconf.noarch-0.98-11.el7

=== How reproducible:
Always

=== Steps to Reproduce:
1. Minimal installation of RHEL 7.4
2. Subscribe to E4S (SAP Solutions) repositories only
# subscription-manager repos --disable='*' --enable="rhel-7-server-e4s-rpms" --enable="rhel-sap-for-rhel-7-server-e4s-rpms"
3. Install 'sapconf' package - yum install sapconf
4. Run the 'sapconf -n' command

=== Actual results:

######        sapconf-0.98-11  by Red Hat       ######
###### Checking System for SAP Installation    ######

RHEL system not subscribed to RHEL for SAP channel ... WARNING

=== Expected results:
######        sapconf-0.98-11  by Red Hat       ######
###### Checking System for SAP Installation    ######

RHEL system subscribed to RHEL for SAP channel ... OK
...

RHEL E4S repository is recognized correctly

=== Additional info:
This change should be backported to all supported EUS releases - 7.2, 7.3, 7.4
Simple way to add the 'e4s' repositories can be achieved by changing the line below in 'sapconf'

Line 706
- if yum repolist | egrep -q "rhel-$(uname -m)-server-sap|rhel-sap-for-rhel-$(awk '{print $7}' /etc/redhat-release | cut -c      -1)-server-rpms"; then
+ if yum repolist | egrep -q "rhel-$(uname -m)-server-sap|rhel-sap-for-rhel-$(awk '{print $7}' /etc/redhat-release | cut -c      -1)-server(-e4s)?-rpms"; then

I can see that there is similar bz1470563 for the EUS channel detection. If that one should be also included then the following line can be used to detect both EUS and E4S repositories.
+ if yum repolist | egrep -q "rhel-$(uname -m)-server-sap|rhel-sap-for-rhel-$(awk '{print $7}' /etc/redhat-release | cut -c      -1)-server(-e4s|-eus)?-rpms"; then