Update default cable len to 0m for TD2 (#8298)

Signed-off-by: Neetha John <nejo@microsoft.com> As part of the buffer reclamation efforts for TD2, setting the default cable len to 0m which means unused ports will have a cable len of 0m. Why I did it To align with the changes in sonic-net/sonic-swss#1830 How to verify it With the default cable len set to 0m and the associated changes in swss, CABLE_LENGTH table had '0m' set for unused ports and accordingly more space was reserved for the shared pool
sonic-net · Aug 3, 2021 · af2024e · af2024e
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diff --git a/device/arista/x86_64-arista_7050_qx32/Arista-7050-QX32/buffers_defaults_t0.j2 b/device/arista/x86_64-arista_7050_qx32/Arista-7050-QX32/buffers_defaults_t0.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/arista/x86_64-arista_7050_qx32/Arista-7050-QX32/buffers_defaults_t1.j2 b/device/arista/x86_64-arista_7050_qx32/Arista-7050-QX32/buffers_defaults_t1.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/buffers_defaults_t0.j2 b/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/buffers_defaults_t0.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/buffers_defaults_t1.j2 b/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/buffers_defaults_t1.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX32S-Q32/buffers_defaults_t0.j2 b/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX32S-Q32/buffers_defaults_t0.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX32S-Q32/buffers_defaults_t1.j2 b/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX32S-Q32/buffers_defaults_t1.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/dell/x86_64-dell_s6000_s1220-r0/Force10-S6000/buffers_defaults_def.j2 b/device/dell/x86_64-dell_s6000_s1220-r0/Force10-S6000/buffers_defaults_def.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/dell/x86_64-dell_s6000_s1220-r0/Force10-S6000/buffers_defaults_t0.j2 b/device/dell/x86_64-dell_s6000_s1220-r0/Force10-S6000/buffers_defaults_t0.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}

diff --git a/device/dell/x86_64-dell_s6000_s1220-r0/Force10-S6000/buffers_defaults_t1.j2 b/device/dell/x86_64-dell_s6000_s1220-r0/Force10-S6000/buffers_defaults_t1.j2
@@ -1,4 +1,4 @@
-{%- set default_cable = '300m' %}
+{%- set default_cable = '0m' %}
 
 {%- macro generate_port_lists(PORT_ALL) %}
     {# Generate list of ports #}