Handling continuously failing test cases while running entire test bucket.

This change includes:
       - Added known_issue tag for test cases failing due to existing issues.
         And where fix for the issue is expected to take little long time.
       - With each tag addition also added github issue number.

Benefits:
       - Failing test cases can be excluded while running entire bucket
         using --exclude known_issue as suffix
       - Continuously failing test cases will have related issue number
         in document section.

Change-Id: I18c40b97a25eff947a5922e4abfacde07fe19a6b
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/tests/test_occ_powercap.robot b/tests/test_occ_powercap.robot
index 02f1a26..31471f9 100644
--- a/tests/test_occ_powercap.robot
+++ b/tests/test_occ_powercap.robot
@@ -22,6 +22,9 @@
     [Documentation]     This testcase is to test get/set powercap feature.
     ...                 In the testcase we are reading min, max value and then
     ...                 try set the random in that range.
+    ...                 Existing Issue: https://github.com/openbmc/openbmc/issues/552
+    [Tags]  known_issue
+
     ${min}=     Get Minimum PowerCap
     log     ${min}
     ${max}=     Get Maximum PowerCap
@@ -38,6 +41,9 @@
 
 Set Less Than Minimum PowerCAP
     [Documentation]     Test set powercap with less than min powercap value
+    ...                 Existing Issue: https://github.com/openbmc/openbmc/issues/552
+    [Tags]  known_issue
+
     ${org_power_cap}=       Get PowerCap
     ${min}=     Get Minimum PowerCap
     ${sample_invalid_pcap}=     Evaluate    ${min}-${100}
@@ -49,6 +55,9 @@
 
 Set More Than Maximum PowerCAP
     [Documentation]     Test set powercap with more than max powercap value
+    ...                 Existing Issue: https://github.com/openbmc/openbmc/issues/552
+    [Tags]  known_issue
+
     ${org_power_cap}=       Get PowerCap
     ${min}=     Get Maximum PowerCap
     ${sample_invalid_pcap}=     Evaluate    ${min}+${100}