[Juniper][QFX5210] Workaround for orchagent crash (#3458)

Orchagent is crashing on the latest SONiC images. Issue #458
is raised to track the problem. Dynamic port breakout
commit 6f40933 introduced
this regression. One of the recommendation that we received
was to disable the loopback and mgmt ports in bcm config.
It was helpful in fixing the issue but not the ideal solution.
It works on qfx5210 as the loopback and management configurations
are not applicable.

While the orchagent crash is being debugged, we need this commit
to fix the issue in qfx5210 platform. This patch can be reversed
once the correct fix for the orchagent is identified.

Signed-off-by: Ciju Rajan K <[email protected]>

Author: ciju-juniper

device/juniper/x86_64-juniper_qfx5210-r0/Juniper-QFX5210-64C/th2-qfx5210-64x100G.config.bcm

@@ -29,17 +29,17 @@ oversubscribe_mode=1
 
 #add loopback port
 # port 33 is the first loopback port
-portmap_33=260:10
+# portmap_33=260:10
 # port 66 is the first management port
-portmap_66=257:10
+# portmap_66=257:10
 # port 67 is the second loopback port
-portmap_67=261:10
+# portmap_67=261:10
 # port 100 is the second management port
-portmap_100=259:10
+# portmap_100=259:10
 # port 101 is the third loopback port
-portmap_101=262:10
+# portmap_101=262:10
 # port 135 is the fourth loopback port
-portmap_135=263:10
+# portmap_135=263:10
 
 #Port0
 #FC18