Properly set multiline custom CA Bundle

Signed-off-by: Andrej Podhradsky <apodhrad@redhat.com>

ods_ci/libs/Helpers.py

@@ -302,3 +302,13 @@ def is_string_empty(self, string):
             SyntaxError: EOL while scanning string literal (<string>, line 1)
         """
         return string is None or string == ""
+
+    @keyword
+    def multiline_to_oneline_string(self, multiline_string, delimeter=" "):
+        """
+        Converts a mutliline string into a oneline string with a provided delimeter.
+        Robot Framework doesn't properly handle multi-line strings and throws
+            Evaluating expression '"...".replace('', '\n')' failed:
+            SyntaxError: unterminated string literal (detected at line 1) (<string>, line 1)
+        """
+        return multiline_string.replace("\n", delimeter)

ods_ci/tests/Tests/100__deploy/130__operators/130__rhods_operator/139__trusted_ca_bundles.robot

@@ -110,6 +110,7 @@ Check ConfigMap Contains CA Bundle Key
 Set Custom CA Bundle Value In DSCI
     [Documentation]    Set Custom CA Bundle value in DSCI
     [Arguments]    ${DSCI}    ${custom_ca_bundle_value}    ${namespace}
+    ${custom_ca_bundle_value}=    Multiline To Oneline String    ${custom_ca_bundle_value}    \\n
     ${rc}   ${output}=    Run And Return Rc And Output
     ...    oc patch DSCInitialization/${DSCI} -n ${namespace} -p '{"spec":{"trustedCABundle":{"customCABundle":"${custom_ca_bundle_value}"}}}' --type merge
     Should Be Equal    "${rc}"    "0"   msg=${output}