Update CI to install krb5

Author: kezhuw

.github/workflows/ci.yml

@@ -31,6 +31,9 @@ jobs:
       with:
           toolchain: stable
           override: true
+    - name: Install krb5
+      run: |
+        sudo apt install -y krb5-user libkrb5-dev
     - name: Build code
       run: cargo build
   test:
@@ -46,6 +49,9 @@ jobs:
       with:
           toolchain: stable
           override: true
+    - name: Install krb5
+      run: |
+        sudo apt install -y krb5-user libkrb5-dev
     - name: Test code
       run: cargo test -- --nocapture
   coverage:
@@ -65,6 +71,9 @@ jobs:
           override: true
           components: llvm-tools-preview
     - run: cargo install grcov
+    - name: Install krb5
+      run: |
+        sudo apt install -y krb5-user libkrb5-dev
     - run: cargo build --verbose
     - name: Run tests
       run: LLVM_PROFILE_FILE="zookeeper-client-%p-%m.profraw" cargo test --verbose -- --nocapture
@@ -95,6 +104,9 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: Swatinem/rust-cache@v1
+    - name: Install krb5
+      run: |
+        sudo apt install -y krb5-user libkrb5-dev
     - name: publish crate
       env:
         CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}