add custom problem detector plugin

pkg/custompluginmonitor/plugin/test-data/longer-than-80-stdout-with-ok-exit-status.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+echo "012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
+exit 0
+

pkg/custompluginmonitor/plugin/test-data/non-defined-exit-status.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+echo "NON-DEFINED-EXIT-STATUS"
+exit 100
+

pkg/custompluginmonitor/plugin/test-data/non-executable.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+echo "NON-EXECUTABLE"
+exit -1
+

pkg/custompluginmonitor/plugin/test-data/non-ok.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+echo "NonOK"
+exit 1
+

pkg/custompluginmonitor/plugin/test-data/ok.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+echo "OK"
+exit 0
+

pkg/custompluginmonitor/plugin/test-data/sleep-3-second-with-ok-exit-status.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+sleep 3
+echo "SLEEP 3 SECOND"
+exit 0
+

pkg/custompluginmonitor/plugin/test-data/unknown.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+echo "UNKNOWN"
+exit 3
+