build: bump xblocks-contrib for the capa grading fix

Picks up the CapaBlock grading fix released in 1.0.3
(openedx/xblocks-core#272), which restores the correct score and graded state
for a problem added to a graded subsection when viewed by its author.
Reverses the pin from 2d315eb.

Points at the branch behind openedx/xblocks-core#286 while that is unreleased,
because no released 1.0.x wheel ships the capa fixtures this repo's tests
import. Becomes `xblocks-contrib==1.0.4` once #286 is released.

Author: AhtishamShahid

requirements/edx/base.txt

@@ -1311,7 +1311,7 @@ xblock-google-drive==0.8.2
     # via -r requirements/edx/bundled.in
 xblock-poll==1.16.1
     # via -r requirements/edx/bundled.in
-xblocks-contrib==0.17.0
+xblocks-contrib @ git+https://github.com/AhtishamShahid/xblocks-core@f532c455cd7210511075c6eaf7d0a265a43ebb65
     # via -r requirements/edx/bundled.in
 xmlsec==1.3.14
     # via

requirements/edx/development.txt

@@ -2319,7 +2319,7 @@ xblock-poll==1.16.1
     # via
     #   -r requirements/edx/doc.txt
     #   -r requirements/edx/testing.txt
-xblocks-contrib==0.17.0
+xblocks-contrib @ git+https://github.com/AhtishamShahid/xblocks-core@f532c455cd7210511075c6eaf7d0a265a43ebb65
     # via
     #   -r requirements/edx/doc.txt
     #   -r requirements/edx/testing.txt

requirements/edx/doc.txt

@@ -1651,7 +1651,7 @@ xblock-google-drive==0.8.2
     # via -r requirements/edx/base.txt
 xblock-poll==1.16.1
     # via -r requirements/edx/base.txt
-xblocks-contrib==0.17.0
+xblocks-contrib @ git+https://github.com/AhtishamShahid/xblocks-core@f532c455cd7210511075c6eaf7d0a265a43ebb65
     # via -r requirements/edx/base.txt
 xmlsec==1.3.14
     # via

requirements/edx/testing.txt

@@ -1730,7 +1730,7 @@ xblock-google-drive==0.8.2
     # via -r requirements/edx/base.txt
 xblock-poll==1.16.1
     # via -r requirements/edx/base.txt
-xblocks-contrib==0.17.0
+xblocks-contrib @ git+https://github.com/AhtishamShahid/xblocks-core@f532c455cd7210511075c6eaf7d0a265a43ebb65
     # via -r requirements/edx/base.txt
 xmlsec==1.3.14
     # via