[Fix][CI] Upgrade all-connectors-it-3/7 timeout

Author: Hisoka-X

.github/workflows/backend.yml

@@ -822,7 +822,7 @@ jobs:
       matrix:
         java: [ '8', '11' ]
         os: [ 'ubuntu-latest' ]
-    timeout-minutes: 120
+    timeout-minutes: 150
     steps:
       - uses: actions/checkout@v2
       - name: Set up JDK ${{ matrix.java }}
@@ -950,7 +950,7 @@ jobs:
       matrix:
         java: [ '8', '11' ]
         os: [ 'ubuntu-latest' ]
-    timeout-minutes: 100
+    timeout-minutes: 120
     steps:
       - uses: actions/checkout@v2
       - name: Set up JDK ${{ matrix.java }}