software/ors-amarisoft: slapos-render-config: Add peers

We already have peer cells in the setup of generated enb/gnb, but there were no
X2/XN peers there. Add them to be able to see how handling of peers works.

Rendered files change as expected:

```
$ ./pythonwitheggs slapos-render-config.py && xdiff config/{old,out}
```

```diff
diff --git a/config/old/ors/enb/enb.cfg b/config/out/ors/enb/enb.cfg
index 252c2e379..15f3b68e9 100644
--- a/config/old/ors/enb/enb.cfg
+++ b/config/out/ors/enb/enb.cfg
@@ -22,7 +22,7 @@
     },
   ],
   gtp_addr: "127.0.1.1",
-  x2_peers: [],
+  x2_peers: ["44.1.1.1", "44.1.1.2"],
   enb_id: 0x1A2D0,

   // LTE cells
diff --git a/config/old/ors/gnb/enb.cfg b/config/out/ors/gnb/enb.cfg
index b401f3513..ac564db6c 100644
--- a/config/old/ors/gnb/enb.cfg
+++ b/config/out/ors/gnb/enb.cfg
@@ -22,7 +22,7 @@
     },
   ],
   gtp_addr: "127.0.1.1",
-  xn_peers: [],
+  xn_peers: ["55.1.1.1", "55.1.1.2"],
   gnb_id_bits: 28,
   gnb_id: 0x12345,
   en_dc_support: true,
```

software/ors-amarisoft/slapos-render-config.py

@@ -81,14 +81,31 @@ def do_enb():
 
         j2render(src, out, json_params % locals())
 
-    peer_lte = {
+    peer_lte1 = {
+        'peer_type':    'lte',
+        'x2_addr':      '44.1.1.1',
+    }
+    peer_lte2 = {
+        'peer_type':    'lte',
+        'x2_addr':      '44.1.1.2',
+    }
+    peer_nr1 = {
+        'peer_type':    'nr',
+        'xn_addr':      '55.1.1.1',
+    }
+    peer_nr2 = {
+        'peer_type':    'nr',
+        'xn_addr':      '55.1.1.2',
+    }
+
+    peercell_lte = {
         'cell_type':        'lte',
         'e_cell_id':        '0x12345',
         'pci':              35,
         'dl_earfcn':        700,
         'tac':              123,
     }
-    peer_nr = {
+    peercell_nr = {
         'cell_type':        'nr',
         'nr_cell_id':       '0x77712',
         'gnb_id_bits':      22,
@@ -126,7 +143,8 @@ def do_enb():
         }},
         "mme_list":   {"1": {"mme_addr": "127.0.1.100"}},
         'plmn_list':  {"1": {'plmn': '00101'}},
-        "ncell_list": {'1': peer_lte},
+        "peers":      {"1": peer_lte1, "2": peer_lte2},
+        "ncell_list": {'1': peercell_lte},
     })
     do('enb.jinja2.cfg', 'ors/gnb/enb.cfg', {
         'gnb_id': "0x12345",
@@ -147,7 +165,8 @@ def do_enb():
         }},
         "amf_list":     {"1": {"amf_addr": "127.0.1.100"}},
         "plmn_list_5g": {'1': {'plmn': '00101', 'tac': 100}},
-        "ncell_list":   {'1': peer_nr},
+        "peers":        {"1": peer_nr1, "2": peer_nr2},
+        "ncell_list":   {'1': peercell_nr},
     })
 
     # TODO render drb.cfg + sib.asn for all cells