Add provision to specify java arguments to ODL

Java options like heap size configuration needs
tweaking for large scale deployments. Allow
customizing those values from TripleO.

puppet-opendaylight will configure these values
in ODL. Corresponding puppet-opendaylight patch is
https://git.opendaylight.org/gerrit/#/c/68491

Change-Id: I99e08314dedfcc71a776423ac3c6c282237cc0c2
Closes-Bug: #1794073

puppet/services/opendaylight-api.yaml

@@ -83,6 +83,13 @@ parameters:
     description: Enable DSCP marking for VXLAN/GRE tunnels
     type: boolean
     default: false
+  OpenDaylightJavaOpts:
+    default: ''
+    type: string
+    description: Specifies the Java options to run ODL with as a string.
+                 Note, these options are in addition to the default Java
+                 options set by the karaf/ODL boot scripts and IP version
+                 based flag set by 'opendaylight' class.
 
 conditions:
 
@@ -118,6 +125,7 @@ outputs:
             opendaylight::snat_mechanism: {get_param: OpenDaylightSNATMechanism}
             opendaylight::log_mechanism: {get_param: OpenDaylightLogMechanism}
             opendaylight::inherit_dscp_marking: {get_param: OpenDaylightInheritDSCPMarking}
+            opendaylight::java_opts: {get_param: OpenDaylightJavaOpts}
           -
             if:
               - internal_tls_enabled

releasenotes/notes/set_java_opts_from_tripleo-d969b1151ec244a0.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Add provision to set java options like heap size configurations in ODL.